SymmetricAlgorithm.xml

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    <summary>Represents the abstract base class from which all implementations of symmetric algorithms must inherit.</summary>
    <remarks>
      <format type="text/markdown"><![CDATA[

## Remarks
 The classes that derive from the <xref:System.Security.Cryptography.SymmetricAlgorithm> class use a chaining mode called cipher block chaining (CBC), which requires a key (<xref:System.Security.Cryptography.SymmetricAlgorithm.Key%2A>) and an initialization vector (<xref:System.Security.Cryptography.SymmetricAlgorithm.IV%2A>) to perform cryptographic transformations on data.  To decrypt data that was encrypted using one of the <xref:System.Security.Cryptography.SymmetricAlgorithm> classes, you must set the <xref:System.Security.Cryptography.SymmetricAlgorithm.Key%2A> property and the <xref:System.Security.Cryptography.SymmetricAlgorithm.IV%2A> property to the same values that were used for encryption.  For a symmetric algorithm to be useful, the secret key must be known only to the sender and the receiver.

 <xref:System.Security.Cryptography.Aes>, <xref:System.Security.Cryptography.DES>, <xref:System.Security.Cryptography.RC2>, and <xref:System.Security.Cryptography.TripleDES> are implementations of symmetric algorithms.

 Note that when using derived classes, it is not enough, from a security perspective, to simply force a garbage collection after you have finished using the object. You must explicitly call the <xref:System.Security.Cryptography.SymmetricAlgorithm.Clear%2A> method on the object to zero out any sensitive data within the object before it is released. Note that garbage collection does not zero out the contents of collected objects but simply marks the memory as available for reallocation. Thus the data contained within a garbage collected object may still be present in the memory heap in unallocated memory. In the case of cryptographic objects, this data could contain sensitive information such as key data or a block of plain text.

 All cryptographic classes in the .NET Framework that hold sensitive data implement a `Clear` method. When called, the `Clear` method overwrites all sensitive data within the object with zeros and then releases the object so that it can be safely garbage collected. When the object has been zeroed and released, you should then call the `Dispose` method with the `disposing` parameter set to `True` to dispose of all managed and unmanaged resources associated with the object.



## Examples
 The following code example uses the <xref:System.Security.Cryptography.Aes> class with the specified <xref:System.Security.Cryptography.SymmetricAlgorithm.Key%2A> property and initialization vector (<xref:System.Security.Cryptography.SymmetricAlgorithm.IV%2A>) to encrypt a file specified by `inName`, and outputs the encrypted result to the file specified by `outName`. The `desKey` and `desIV` parameters to the method are 8-byte arrays. You must have the high encryption pack installed to run this example.

 :::code language="cpp" source="~/snippets/cpp/VS_Snippets_CLR_Classic/classic CryptoStream Example/CPP/source.cpp" id="Snippet1":::
 :::code language="csharp" source="~/snippets/csharp/System.Security.Cryptography/SymmetricAlgorithm/Overview/source.cs" id="Snippet1":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_Classic/classic CryptoStream Example/VB/source.vb" id="Snippet1":::

 ]]></format>
    </remarks>
    <block subset="none" type="overrides">
      <para>When you inherit from the <see cref="T:System.Security.Cryptography.SymmetricAlgorithm" /> class, you must override the following members: <see cref="M:System.Security.Cryptography.SymmetricAlgorithm.CreateDecryptor(System.Byte[],System.Byte[])" />, <see cref="M:System.Security.Cryptography.SymmetricAlgorithm.CreateEncryptor(System.Byte[],System.Byte[])" />, <see cref="M:System.Security.Cryptography.SymmetricAlgorithm.GenerateIV" />, and <see cref="M:System.Security.Cryptography.SymmetricAlgorithm.GenerateKey" />.</para>
    </block>
    <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
 You cannot create an instance of an abstract class. Application code creates a new instance of a derived class.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <summary>Gets or sets the block size, in bits, of the cryptographic operation.</summary>
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## Remarks
 The block size is the basic unit of data that can be encrypted or decrypted in one operation. Messages longer than the block size are handled as successive blocks; messages shorter than the block size must be padded with extra bits to reach the size of a block. Valid block sizes are determined by the symmetric algorithm used.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <summary>Represents the block size, in bits, of the cryptographic operation.</summary>
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## Remarks
 The block size is the basic unit of data that can be encrypted or decrypted in one operation. Messages longer than the block size are handled as successive blocks; messages shorter than the block size must be padded with extra bits to reach the size of a block. Valid block sizes are determined by the symmetric algorithm used.

 This field is accessed through the <xref:System.Security.Cryptography.SymmetricAlgorithm.BlockSize%2A> property.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
 Note that when using derived classes, it is not enough, from a security perspective, to simply force a garbage collection after you have finished using the object. You must explicitly call the <xref:System.Security.Cryptography.SymmetricAlgorithm.Clear%2A> method on the object to zero out any sensitive data within the object before it is released. Note that garbage collection does not zero out the contents of collected objects but simply marks the memory as available for reallocation. Thus the data contained within a garbage collected object may still be present in the memory heap in unallocated memory. In the case of cryptographic objects, this data could contain sensitive information such as key data or a block of plain text.

 All cryptographic classes in the .NET Framework that hold sensitive data implement a `Clear` method. When called, the `Clear` method overwrites all sensitive data within the object with zeros and then releases the object so that it can be safely garbage collected. When the object has been zeroed and released, you should then call the `Dispose` method with the `disposing` parameter set to `True` to dispose of all managed and unmanaged resources associated with the object.

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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <summary>Creates a default cryptographic object used to perform the symmetric algorithm.</summary>
        <returns>A default cryptographic object used to perform the symmetric algorithm.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method is obsolete in .NET 5 and later versions.

We recommend that you specify the algorithm by calling the <xref:System.Security.Cryptography.SymmetricAlgorithm.Create(System.String)> overload of this method.

 ]]></format>
        </remarks>
        <exception cref="T:System.PlatformNotSupportedException">.NET Core 2.0 - 3.1 and .NET 5 and later: In all cases.</exception>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <ReturnType>System.Security.Cryptography.SymmetricAlgorithm</ReturnType>
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        <Parameter Name="algName" Type="System.String" Index="0" FrameworkAlternate="net-10.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netframework-1.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-2.0;netstandard-2.1" />
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        <param name="algName">The name of the specific implementation of the <see cref="T:System.Security.Cryptography.SymmetricAlgorithm" /> class to use.</param>
        <summary>Creates the specified cryptographic object used to perform the symmetric algorithm.</summary>
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        <remarks>To be added.</remarks>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
 This method decrypts an encrypted message created using the <xref:System.Security.Cryptography.SymmetricAlgorithm.CreateEncryptor%2A> overload with the same signature.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <param name="rgbIV">The initialization vector to use for the symmetric algorithm.</param>
        <summary>When overridden in a derived class, creates a symmetric decryptor object with the specified <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.Key" /> property and initialization vector (<see cref="P:System.Security.Cryptography.SymmetricAlgorithm.IV" />).</summary>
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## Remarks
 This method decrypts an encrypted message created using the <xref:System.Security.Cryptography.SymmetricAlgorithm.CreateEncryptor%2A> overload with the same parameters.

 ]]></format>
        </remarks>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <summary>Creates a symmetric encryptor object with the current <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.Key" /> property and initialization vector (<see cref="P:System.Security.Cryptography.SymmetricAlgorithm.IV" />).</summary>
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        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 If the current <xref:System.Security.Cryptography.SymmetricAlgorithm.Key%2A> property is `null`, the <xref:System.Security.Cryptography.SymmetricAlgorithm.GenerateKey%2A> method is called to create a new random <xref:System.Security.Cryptography.SymmetricAlgorithm.Key%2A>. If the current <xref:System.Security.Cryptography.SymmetricAlgorithm.IV%2A> property is `null`, the <xref:System.Security.Cryptography.SymmetricAlgorithm.GenerateIV%2A> method is called to create a new random <xref:System.Security.Cryptography.SymmetricAlgorithm.IV%2A>.

 Use the <xref:System.Security.Cryptography.SymmetricAlgorithm.CreateDecryptor%2A> overload with the same signature to decrypt the result of this method.



## Examples
 The following example encrypts a string using the transform object returned from the <xref:System.Security.Cryptography.SymmetricAlgorithm.CreateEncryptor%2A> method.

 :::code language="cpp" source="~/snippets/cpp/VS_Snippets_CLR_System/system.security.cryptography.symmetricalgorithm/cpp/encryptor.cpp" id="Snippet1":::
 :::code language="csharp" source="~/snippets/csharp/System.Security.Cryptography/SymmetricAlgorithm/CreateEncryptor/encryptor.cs" interactive="try-dotnet" id="Snippet1":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.security.cryptography.symmetricalgorithm/vb/encryptor.vb" id="Snippet1":::

 ]]></format>
        </remarks>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <param name="rgbKey">The secret key to use for the symmetric algorithm.</param>
        <param name="rgbIV">The initialization vector to use for the symmetric algorithm.</param>
        <summary>When overridden in a derived class, creates a symmetric encryptor object with the specified <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.Key" /> property and initialization vector (<see cref="P:System.Security.Cryptography.SymmetricAlgorithm.IV" />).</summary>
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## Remarks
 Use the <xref:System.Security.Cryptography.SymmetricAlgorithm.CreateDecryptor%2A> overload with the same parameters to decrypt the result of this method.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography.Primitives</AssemblyName>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
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      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography</AssemblyName>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
        <AssemblyVersion>8.0.0.0</AssemblyVersion>
        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Byte[]</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="ciphertext" Type="System.Byte[]" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.Byte[]" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Decrypts data using CBC mode with the specified padding mode.</summary>
        <returns>The decrypted plaintext data.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptCbcCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentNullException">
          <paramref name="ciphertext" /> or <paramref name="iv" /> is <see langword="null" />.</exception>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.</exception>
      </Docs>
    </Member>
    <Member MemberName="DecryptCbc">
      <MemberSignature Language="C#" Value="public byte[] DecryptCbc (ReadOnlySpan&lt;byte&gt; ciphertext, ReadOnlySpan&lt;byte&gt; iv, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.PKCS7);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance unsigned int8[] DecryptCbc(valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; ciphertext, valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; iv, valuetype System.Security.Cryptography.PaddingMode paddingMode) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.DecryptCbc(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Security.Cryptography.PaddingMode)" />
      <MemberSignature Language="VB.NET" Value="Public Function DecryptCbc (ciphertext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.PKCS7) As Byte()" />
      <MemberSignature Language="F#" Value="member this.DecryptCbc : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * System.Security.Cryptography.PaddingMode -&gt; byte[]" Usage="symmetricAlgorithm.DecryptCbc (ciphertext, iv, paddingMode)" />
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        <AssemblyName>System.Security.Cryptography</AssemblyName>
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        <AssemblyVersion>10.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
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      <ReturnValue>
        <ReturnType>System.Byte[]</ReturnType>
        <Attributes>
          <Attribute FrameworkAlternate="net-10.0">
            <AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(1)]</AttributeName>
            <AttributeName Language="F#">[&lt;System.Runtime.CompilerServices.Nullable(1)&gt;]</AttributeName>
          </Attribute>
        </Attributes>
      </ReturnValue>
      <Parameters>
        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Decrypts data using CBC mode with the specified padding mode.</summary>
        <returns>The decrypted plaintext data.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptCbcCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.</exception>
      </Docs>
    </Member>
    <Member MemberName="DecryptCbc">
      <MemberSignature Language="C#" Value="public int DecryptCbc (ReadOnlySpan&lt;byte&gt; ciphertext, ReadOnlySpan&lt;byte&gt; iv, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.PKCS7);" />
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      <MemberSignature Language="VB.NET" Value="Public Function DecryptCbc (ciphertext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.PKCS7) As Integer" />
      <MemberSignature Language="F#" Value="member this.DecryptCbc : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode -&gt; int" Usage="symmetricAlgorithm.DecryptCbc (ciphertext, iv, destination, paddingMode)" />
      <MemberType>Method</MemberType>
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        <AssemblyVersion>6.0.0.0</AssemblyVersion>
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      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
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      <ReturnValue>
        <ReturnType>System.Int32</ReturnType>
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      <Parameters>
        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the plaintext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Decrypts data into the specified buffer, using CBC mode with the specified padding mode.</summary>
        <returns>The total number of bytes written to <paramref name="destination" /></returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptCbcCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.</exception>
        <exception cref="T:System.ArgumentException">The buffer in <paramref name="destination" /> is too small to hold the plaintext data.</exception>
      </Docs>
    </Member>
    <Member MemberName="DecryptCfb">
      <MemberSignature Language="C#" Value="public byte[] DecryptCfb (byte[] ciphertext, byte[] iv, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.None, int feedbackSizeInBits = 8);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance unsigned int8[] DecryptCfb(unsigned int8[] ciphertext, unsigned int8[] iv, valuetype System.Security.Cryptography.PaddingMode paddingMode, int32 feedbackSizeInBits) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.DecryptCfb(System.Byte[],System.Byte[],System.Security.Cryptography.PaddingMode,System.Int32)" />
      <MemberSignature Language="VB.NET" Value="Public Function DecryptCfb (ciphertext As Byte(), iv As Byte(), Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.None, Optional feedbackSizeInBits As Integer = 8) As Byte()" />
      <MemberSignature Language="F#" Value="member this.DecryptCfb : byte[] * byte[] * System.Security.Cryptography.PaddingMode * int -&gt; byte[]" Usage="symmetricAlgorithm.DecryptCfb (ciphertext, iv, paddingMode, feedbackSizeInBits)" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography.Primitives</AssemblyName>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
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      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography</AssemblyName>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
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        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
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      <ReturnValue>
        <ReturnType>System.Byte[]</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="ciphertext" Type="System.Byte[]" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.Byte[]" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="feedbackSizeInBits" Type="System.Int32" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="feedbackSizeInBits">The feedback size, specified in bits.</param>
        <summary>Decrypts data using CFB mode with the specified padding mode and feedback size.</summary>
        <returns>The decrypted plaintext data.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptCfbCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentNullException">
          <paramref name="ciphertext" /> or <paramref name="iv" /> is <see langword="null" />.</exception>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.

-or-

<paramref name="feedbackSizeInBits" /> is not positive or represent a whole number of bytes.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.

-or-

The feedback size is not valid for the algorithm.</exception>
      </Docs>
    </Member>
    <Member MemberName="DecryptCfb">
      <MemberSignature Language="C#" Value="public byte[] DecryptCfb (ReadOnlySpan&lt;byte&gt; ciphertext, ReadOnlySpan&lt;byte&gt; iv, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.None, int feedbackSizeInBits = 8);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance unsigned int8[] DecryptCfb(valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; ciphertext, valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; iv, valuetype System.Security.Cryptography.PaddingMode paddingMode, int32 feedbackSizeInBits) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.DecryptCfb(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32)" />
      <MemberSignature Language="VB.NET" Value="Public Function DecryptCfb (ciphertext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.None, Optional feedbackSizeInBits As Integer = 8) As Byte()" />
      <MemberSignature Language="F#" Value="member this.DecryptCfb : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int -&gt; byte[]" Usage="symmetricAlgorithm.DecryptCfb (ciphertext, iv, paddingMode, feedbackSizeInBits)" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography.Primitives</AssemblyName>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
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        <AssemblyVersion>10.0.0.0</AssemblyVersion>
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      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
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      <ReturnValue>
        <ReturnType>System.Byte[]</ReturnType>
        <Attributes>
          <Attribute FrameworkAlternate="net-10.0">
            <AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(1)]</AttributeName>
            <AttributeName Language="F#">[&lt;System.Runtime.CompilerServices.Nullable(1)&gt;]</AttributeName>
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      </ReturnValue>
      <Parameters>
        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="feedbackSizeInBits" Type="System.Int32" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="feedbackSizeInBits">The feedback size, specified in bits.</param>
        <summary>Decrypts data using CFB mode with the specified padding mode and feedback size.</summary>
        <returns>The decrypted plaintext data.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptCfbCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.

-or-

<paramref name="feedbackSizeInBits" /> is not positive or represent a whole number of bytes.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.

-or-

The feedback size is not valid for the algorithm.</exception>
      </Docs>
    </Member>
    <Member MemberName="DecryptCfb">
      <MemberSignature Language="C#" Value="public int DecryptCfb (ReadOnlySpan&lt;byte&gt; ciphertext, ReadOnlySpan&lt;byte&gt; iv, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.None, int feedbackSizeInBits = 8);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance int32 DecryptCfb(valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; ciphertext, valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; iv, valuetype System.Span`1&lt;unsigned int8&gt; destination, valuetype System.Security.Cryptography.PaddingMode paddingMode, int32 feedbackSizeInBits) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.DecryptCfb(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32)" />
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        <AssemblyName>netstandard</AssemblyName>
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      <ReturnValue>
        <ReturnType>System.Int32</ReturnType>
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      <Parameters>
        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="feedbackSizeInBits" Type="System.Int32" Index="4" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the plaintext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="feedbackSizeInBits">The feedback size, specified in bits.</param>
        <summary>Decrypts data into the specified buffer, using CFB mode with the specified padding mode and feedback size.</summary>
        <returns>The total number of bytes written to <paramref name="destination" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptCfbCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.

-or-

<paramref name="feedbackSizeInBits" /> is not positive or represent a whole number of bytes.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).

-or-

The buffer in <paramref name="destination" /> is too small to hold the plaintext data.</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.

-or-

<paramref name="feedbackSizeInBits" /> is not valid for the algorithm.</exception>
      </Docs>
    </Member>
    <Member MemberName="DecryptEcb">
      <MemberSignature Language="C#" Value="public byte[] DecryptEcb (byte[] ciphertext, System.Security.Cryptography.PaddingMode paddingMode);" />
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        <Parameter Name="ciphertext" Type="System.Byte[]" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
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        <param name="ciphertext">The data to decrypt.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Decrypts data using ECB mode with the specified padding mode.</summary>
        <returns>The decrypted plaintext data.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptEcbCore(System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentNullException">
          <paramref name="ciphertext" /> is <see langword="null" />.</exception>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.</exception>
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        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
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        <param name="ciphertext">The data to decrypt.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Decrypts data using ECB mode with the specified padding mode.</summary>
        <returns>The decrypted plaintext data.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptEcbCore(System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.</exception>
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        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
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        <param name="ciphertext">The data to decrypt.</param>
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        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Decrypts data into the specified buffer, using ECB mode with the specified padding mode.</summary>
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        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptEcbCore(System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
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        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.</exception>
        <exception cref="T:System.ArgumentException">The buffer in <paramref name="destination" /> is too small to hold the plaintext data.</exception>
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        <summary>Releases all resources used by the current instance of the <see cref="T:System.Security.Cryptography.SymmetricAlgorithm" /> class.</summary>
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## Remarks
 Call `Dispose` when you are finished using the <xref:System.Security.Cryptography.SymmetricAlgorithm>. The `Dispose` method leaves the <xref:System.Security.Cryptography.SymmetricAlgorithm> in an unusable state. After calling `Dispose`, you must release all references to the <xref:System.Security.Cryptography.SymmetricAlgorithm> so the garbage collector can reclaim the memory that the <xref:System.Security.Cryptography.SymmetricAlgorithm> was occupying.

 For more information, see [Cleaning Up Unmanaged Resources](/dotnet/standard/garbage-collection/unmanaged) and [Implementing a Dispose Method](/dotnet/standard/garbage-collection/implementing-dispose).

> [!NOTE]
>  Always call `Dispose` before you release your last reference to the <xref:System.Security.Cryptography.SymmetricAlgorithm>. Otherwise, the resources it is using will not be freed until the garbage collector calls the <xref:System.Security.Cryptography.SymmetricAlgorithm> object's `Finalize` method.

 ]]></format>
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          <see langword="true" /> to release both managed and unmanaged resources; <see langword="false" /> to release only unmanaged resources.</param>
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          <format type="text/markdown"><![CDATA[

## Remarks
 This method is called by the public `Dispose()` method and the <xref:System.Object.Finalize> method, if it has been overridden. `Dispose()` invokes this method with the `disposing` parameter set to `true`. `Finalize` invokes this method with `disposing` set to `false`.

 When the `disposing` parameter is `true`, this method releases all resources held by any managed objects that this <xref:System.Security.Cryptography.SymmetricAlgorithm> references. This method invokes the `Dispose()` method of each referenced object.

 ]]></format>
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            <see langword="Dispose" /> can be called multiple times by other objects. When overriding <see langword="Dispose(Boolean)" />, be careful not to reference objects that have been previously disposed in an earlier call to <see langword="Dispose" />. For more information about how to implement <see langword="Dispose(Boolean)" />, see <see href="/dotnet/standard/garbage-collection/implementing-dispose">Implementing a Dispose Method</see>.

 For more information about <see langword="Dispose" /> and <see langword="Finalize" />, see <see href="/dotnet/standard/garbage-collection/unmanaged">Cleaning Up Unmanaged Resources</see>.</para>
        </block>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
      </Docs>
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        <Parameter Name="plaintext" Type="System.Byte[]" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.Byte[]" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
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        <param name="plaintext">The data to encrypt.</param>
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        <summary>Encrypts data using CBC mode with the specified padding mode.</summary>
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        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCbcCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
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        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.</exception>
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        <param name="plaintext">The data to encrypt.</param>
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        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCbcCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
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          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
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        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.</exception>
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      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.EncryptCbc(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode)" />
      <MemberSignature Language="VB.NET" Value="Public Function EncryptCbc (plaintext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.PKCS7) As Integer" />
      <MemberSignature Language="F#" Value="member this.EncryptCbc : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode -&gt; int" Usage="symmetricAlgorithm.EncryptCbc (plaintext, iv, destination, paddingMode)" />
      <MemberType>Method</MemberType>
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        <AssemblyVersion>6.0.0.0</AssemblyVersion>
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        <AssemblyName>System.Security.Cryptography</AssemblyName>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
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        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
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      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Int32</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the ciphertext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Encrypts data into the specified buffer, using CBC mode with the specified padding mode.</summary>
        <returns>The total number of bytes written to <paramref name="destination" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCbcCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.</exception>
        <exception cref="T:System.ArgumentException">The buffer in <paramref name="destination" /> is too small to hold the ciphertext data.</exception>
      </Docs>
    </Member>
    <Member MemberName="EncryptCfb">
      <MemberSignature Language="C#" Value="public byte[] EncryptCfb (byte[] plaintext, byte[] iv, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.None, int feedbackSizeInBits = 8);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance unsigned int8[] EncryptCfb(unsigned int8[] plaintext, unsigned int8[] iv, valuetype System.Security.Cryptography.PaddingMode paddingMode, int32 feedbackSizeInBits) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.EncryptCfb(System.Byte[],System.Byte[],System.Security.Cryptography.PaddingMode,System.Int32)" />
      <MemberSignature Language="VB.NET" Value="Public Function EncryptCfb (plaintext As Byte(), iv As Byte(), Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.None, Optional feedbackSizeInBits As Integer = 8) As Byte()" />
      <MemberSignature Language="F#" Value="member this.EncryptCfb : byte[] * byte[] * System.Security.Cryptography.PaddingMode * int -&gt; byte[]" Usage="symmetricAlgorithm.EncryptCfb (plaintext, iv, paddingMode, feedbackSizeInBits)" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography.Primitives</AssemblyName>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
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      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography</AssemblyName>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
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        <AssemblyVersion>10.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Byte[]</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="plaintext" Type="System.Byte[]" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.Byte[]" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="feedbackSizeInBits" Type="System.Int32" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="feedbackSizeInBits">The feedback size, specified in bits.</param>
        <summary>Encrypts data using CFB mode with the specified padding mode and feedback size.</summary>
        <returns>The encrypted ciphertext data.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCfbCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentNullException">
          <paramref name="plaintext" /> or <paramref name="iv" /> is <see langword="null" />.</exception>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.

-or-

<paramref name="feedbackSizeInBits" /> is not positive or represent a whole number of bytes.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.

-or-

The feedback size is not valid for the algorithm.</exception>
      </Docs>
    </Member>
    <Member MemberName="EncryptCfb">
      <MemberSignature Language="C#" Value="public byte[] EncryptCfb (ReadOnlySpan&lt;byte&gt; plaintext, ReadOnlySpan&lt;byte&gt; iv, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.None, int feedbackSizeInBits = 8);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance unsigned int8[] EncryptCfb(valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; plaintext, valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; iv, valuetype System.Security.Cryptography.PaddingMode paddingMode, int32 feedbackSizeInBits) cil managed" />
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      <MemberSignature Language="VB.NET" Value="Public Function EncryptCfb (plaintext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.None, Optional feedbackSizeInBits As Integer = 8) As Byte()" />
      <MemberSignature Language="F#" Value="member this.EncryptCfb : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int -&gt; byte[]" Usage="symmetricAlgorithm.EncryptCfb (plaintext, iv, paddingMode, feedbackSizeInBits)" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography.Primitives</AssemblyName>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
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        <AssemblyName>System.Security.Cryptography</AssemblyName>
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      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
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      <ReturnValue>
        <ReturnType>System.Byte[]</ReturnType>
        <Attributes>
          <Attribute FrameworkAlternate="net-10.0">
            <AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(1)]</AttributeName>
            <AttributeName Language="F#">[&lt;System.Runtime.CompilerServices.Nullable(1)&gt;]</AttributeName>
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      </ReturnValue>
      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="feedbackSizeInBits" Type="System.Int32" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="feedbackSizeInBits">The feedback size, specified in bits.</param>
        <summary>Encrypts data using CFB mode with the specified padding mode and feedback size.</summary>
        <returns>The encrypted ciphertext data.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCfbCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.

-or-

<paramref name="feedbackSizeInBits" /> is not positive or represent a whole number of bytes.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.

-or-

The feedback size is not valid for the algorithm.</exception>
      </Docs>
    </Member>
    <Member MemberName="EncryptCfb">
      <MemberSignature Language="C#" Value="public int EncryptCfb (ReadOnlySpan&lt;byte&gt; plaintext, ReadOnlySpan&lt;byte&gt; iv, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.None, int feedbackSizeInBits = 8);" />
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      <MemberSignature Language="VB.NET" Value="Public Function EncryptCfb (plaintext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.None, Optional feedbackSizeInBits As Integer = 8) As Integer" />
      <MemberSignature Language="F#" Value="member this.EncryptCfb : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int -&gt; int" Usage="symmetricAlgorithm.EncryptCfb (plaintext, iv, destination, paddingMode, feedbackSizeInBits)" />
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        <ReturnType>System.Int32</ReturnType>
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      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="feedbackSizeInBits" Type="System.Int32" Index="4" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the ciphertext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="feedbackSizeInBits">The feedback size, specified in bits.</param>
        <summary>Encrypts data into the specified buffer, using CFB mode with the specified padding mode and feedback size.</summary>
        <returns>The total number of bytes written to <paramref name="destination" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCfbCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.

-or-

<paramref name="feedbackSizeInBits" /> is not positive or represent a whole number of bytes.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.

-or-

The feedback size is not valid for the algorithm.</exception>
      </Docs>
    </Member>
    <Member MemberName="EncryptEcb">
      <MemberSignature Language="C#" Value="public byte[] EncryptEcb (byte[] plaintext, System.Security.Cryptography.PaddingMode paddingMode);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance unsigned int8[] EncryptEcb(unsigned int8[] plaintext, valuetype System.Security.Cryptography.PaddingMode paddingMode) cil managed" />
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        <AssemblyName>netstandard</AssemblyName>
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        <ReturnType>System.Byte[]</ReturnType>
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      <Parameters>
        <Parameter Name="plaintext" Type="System.Byte[]" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Encrypts data using ECB mode with the specified padding mode.</summary>
        <returns>The encrypted ciphertext data.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptEcbCore(System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentNullException">
          <paramref name="plaintext" /> is <see langword="null" />.</exception>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.</exception>
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    </Member>
    <Member MemberName="EncryptEcb">
      <MemberSignature Language="C#" Value="public byte[] EncryptEcb (ReadOnlySpan&lt;byte&gt; plaintext, System.Security.Cryptography.PaddingMode paddingMode);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance unsigned int8[] EncryptEcb(valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; plaintext, valuetype System.Security.Cryptography.PaddingMode paddingMode) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.EncryptEcb(System.ReadOnlySpan{System.Byte},System.Security.Cryptography.PaddingMode)" />
      <MemberSignature Language="VB.NET" Value="Public Function EncryptEcb (plaintext As ReadOnlySpan(Of Byte), paddingMode As PaddingMode) As Byte()" />
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        <AssemblyName>netstandard</AssemblyName>
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        <ReturnType>System.Byte[]</ReturnType>
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          <Attribute FrameworkAlternate="net-10.0">
            <AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(1)]</AttributeName>
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      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Encrypts data using ECB mode with the specified padding mode.</summary>
        <returns>The encrypted ciphertext data.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptEcbCore(System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.</exception>
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    <Member MemberName="EncryptEcb">
      <MemberSignature Language="C#" Value="public int EncryptEcb (ReadOnlySpan&lt;byte&gt; plaintext, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode);" />
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      <ReturnValue>
        <ReturnType>System.Int32</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="destination">The buffer to receive the ciphertext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Encrypts data into the specified buffer, using ECB mode with the specified padding mode.</summary>
        <returns>The total number of bytes written to <paramref name="destination" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptEcbCore(System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.</exception>
        <exception cref="T:System.ArgumentException">The buffer in <paramref name="destination" /> is too small to hold the ciphertext data.</exception>
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        <summary>Gets or sets the feedback size, in bits, of the cryptographic operation for the Cipher Feedback (CFB) and Output Feedback (OFB) cipher modes.</summary>
        <value>The feedback size in bits.</value>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 The feedback size determines the amount of data that is fed back to successive encryption or decryption operations. The feedback size cannot be greater than the block size.

 ]]></format>
        </remarks>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The feedback size is larger than the block size.</exception>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <summary>Represents the feedback size, in bits, of the cryptographic operation.</summary>
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          <format type="text/markdown"><![CDATA[

## Remarks
 The feedback size determines the amount of data that is fed back to successive encryption or decryption operations. The feedback size cannot be greater than the block size.

 This field is accessed through the <xref:System.Security.Cryptography.SymmetricAlgorithm.FeedbackSize%2A> property.

 ]]></format>
        </remarks>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <summary>When overridden in a derived class, generates a random initialization vector (<see cref="P:System.Security.Cryptography.SymmetricAlgorithm.IV" />) to use for the algorithm.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 In general, there is no reason to use this method, because `CreateEncryptor()` or `CreateEncryptor(null, null)` automatically generates both an initialization vector and a key. However, you may want to use the <xref:System.Security.Cryptography.SymmetricAlgorithm.GenerateIV%2A> method to reuse a symmetric algorithm instance with a different initialization vector.

 ]]></format>
        </remarks>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <summary>When overridden in a derived class, generates a random key (<see cref="P:System.Security.Cryptography.SymmetricAlgorithm.Key" />) to use for the algorithm.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 In general, there is no reason to use this method, because `CreateEncryptor()` or `CreateEncryptor(null, null)` automatically generates both an initialization vector and a key. However, you may want to use the <xref:System.Security.Cryptography.SymmetricAlgorithm.GenerateKey%2A> method to reuse a symmetric algorithm instance with a different key.

 ]]></format>
        </remarks>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
      </Docs>
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        <param name="plaintextLength">The plaintext length, in bytes.</param>
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        <summary>Gets the length of a ciphertext with a given padding mode and plaintext length in CBC mode.</summary>
        <returns>The length, in bytes, of the ciphertext with padding.</returns>
        <remarks>To be added.</remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="plaintextLength" /> is a negative number.

-or-

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-or-

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          <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> is not a positive integer.

-or-

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        <exception cref="T:System.ArgumentException">The padding mode <see cref="F:System.Security.Cryptography.PaddingMode.None" /> was used, but <paramref name="plaintextLength" /> is not a whole number of blocks.</exception>
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        <param name="plaintextLength">The plaintext length, in bytes.</param>
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        <summary>Gets the length of a ciphertext with a given padding mode and plaintext length in CFB mode.</summary>
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        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

`feedbackSizeInBits` accepts any value that is a valid feedback size, regardless if the algorithm
            supports the specified feedback size.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="feedbackSizeInBits" /> is not a positive number.

-or-

<paramref name="plaintextLength" /> is a negative number.

-or-

<paramref name="plaintextLength" /> when padded is too large to represent as a signed 32-bit integer.

-or-

<paramref name="paddingMode" /> is not a valid padding mode.</exception>
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-or-

<paramref name="feedbackSizeInBits" /> is not a whole number of bytes. It must be divisible by 8.</exception>
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        <remarks>To be added.</remarks>
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          <paramref name="plaintextLength" /> is a negative number.

-or-

<paramref name="plaintextLength" /> when padded is too large to represent as a signed 32-bit integer.

-or-

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          <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> is not a positive integer.

-or-

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        <summary>Gets or sets the initialization vector (<see cref="P:System.Security.Cryptography.SymmetricAlgorithm.IV" />) for the symmetric algorithm.</summary>
        <value>The initialization vector.</value>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 The <xref:System.Security.Cryptography.SymmetricAlgorithm.IV%2A> property is automatically set to a new random value whenever you create a new instance of one of the <xref:System.Security.Cryptography.SymmetricAlgorithm> classes or when you manually call the <xref:System.Security.Cryptography.SymmetricAlgorithm.GenerateIV%2A> method.  The size of the <xref:System.Security.Cryptography.SymmetricAlgorithm.IV%2A> property must be the same as the <xref:System.Security.Cryptography.SymmetricAlgorithm.BlockSize%2A> property divided by 8.

 The classes that derive from the <xref:System.Security.Cryptography.SymmetricAlgorithm> class use a chaining mode called cipher block chaining (CBC), which requires a key and an initialization vector to perform cryptographic transformations on data.  To decrypt data that was encrypted using one of the <xref:System.Security.Cryptography.SymmetricAlgorithm> classes, you must set the <xref:System.Security.Cryptography.SymmetricAlgorithm.Key%2A> property and <xref:System.Security.Cryptography.SymmetricAlgorithm.IV%2A> property to the same values that were used for encryption.

 For a given secret key *k*, a simple block cipher that does not use an initialization vector will encrypt the same input block of plain text into the same output block of cipher text. If you have duplicate blocks within your plain text stream, you will have duplicate blocks within your cipher text stream. If unauthorized users know anything about the structure of a block of your plain text, they can use that information to decipher the known cipher text block and possibly recover your key. To combat this problem, information from the previous block is mixed into the process of encrypting the next block. Thus, the output of two identical plain text blocks is different. Because this technique uses the previous block to encrypt the next block, an initialization vector is needed to encrypt the first block of data.

 ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentNullException">An attempt was made to set the initialization vector to <see langword="null" />.</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">An attempt was made to set the initialization vector to an invalid size.</exception>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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          <format type="text/markdown"><![CDATA[

## Remarks
 This field is accessed through the <xref:System.Security.Cryptography.SymmetricAlgorithm.IV%2A> property.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 The secret key is used both for encryption and for decryption. For a symmetric algorithm to be successful, the secret key must be known only to the sender and the receiver. The valid key sizes are specified by the particular symmetric algorithm implementation and are listed in the <xref:System.Security.Cryptography.SymmetricAlgorithm.LegalKeySizes%2A> property.

 If this property is `null` when it is used, the <xref:System.Security.Cryptography.SymmetricAlgorithm.GenerateKey%2A> method is called to create a new random value.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
 The valid key sizes are specified by the particular symmetric algorithm implementation and are listed in the <xref:System.Security.Cryptography.SymmetricAlgorithm.LegalKeySizes%2A> property.

 Changing the `KeySize` value resets the key and generates a new random key. This happens whenever the `KeySize` property setter is invoked (including when it's assigned the same value).

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 The valid key sizes are specified by the particular symmetric algorithm implementation and are listed in the <xref:System.Security.Cryptography.SymmetricAlgorithm.LegalKeySizes%2A> property.

 This field is accessed through the <xref:System.Security.Cryptography.SymmetricAlgorithm.KeySize%2A> property.

 ]]></format>
        </remarks>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
 The secret key is used both for encryption and for decryption. For a symmetric algorithm to be successful, the secret key must be known only to the sender and the receiver. The valid key sizes are specified by the particular symmetric algorithm implementation and are listed in the <xref:System.Security.Cryptography.SymmetricAlgorithm.LegalKeySizes%2A> property.

 This field is accessed through the <xref:System.Security.Cryptography.SymmetricAlgorithm.Key%2A> property.

 ]]></format>
        </remarks>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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        <value>An array that contains the block sizes supported by the algorithm.</value>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 The symmetric algorithm supports only block sizes that match an entry in this array.



## Examples
 The following example shows the value of <xref:System.Security.Cryptography.SymmetricAlgorithm.LegalBlockSizes%2A> for the symmetric algorithms.

 :::code language="csharp" source="~/snippets/csharp/System.Security.Cryptography/SymmetricAlgorithm/LegalBlockSizes/program.cs" id="Snippet1":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.security.cryptography.symmetricalgorithm.blocksize/vb/program.vb" id="Snippet1":::

 ]]></format>
        </remarks>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
 The symmetric algorithm supports only block sizes that match an entry in this array.

 This field is accessed through the <xref:System.Security.Cryptography.SymmetricAlgorithm.LegalBlockSizes%2A> property.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
 The symmetric algorithm supports only key sizes that match an entry in this array.



## Examples
 The following example shows the value of <xref:System.Security.Cryptography.SymmetricAlgorithm.LegalKeySizes%2A> for the AES symmetric algorithm.

 :::code language="csharp" source="~/snippets/csharp/System.Security.Cryptography/SymmetricAlgorithm/LegalBlockSizes/program.cs" interactive="try-dotnet" id="Snippet1":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.security.cryptography.symmetricalgorithm.blocksize/vb/program.vb" id="Snippet1":::

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
 The symmetric algorithm supports only key sizes that match an entry in this array.

 This field is accessed through the <xref:System.Security.Cryptography.SymmetricAlgorithm.LegalKeySizes%2A> property.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
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 This field is accessed through the <xref:System.Security.Cryptography.SymmetricAlgorithm.Mode%2A> property.

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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
 Most plain text messages do not consist of a number of bytes that completely fill blocks. Often, there are not enough bytes to fill the last block. When this happens, a padding string is added to the text. For example, if the block length is 64 bits and the last block contains only 40 bits, 24 bits of padding are added. See the <xref:System.Security.Cryptography.PaddingMode> enumeration for a description of specific modes.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks
 Most plain text messages do not consist of a number of bytes that completely fill blocks. Often, there are not enough bytes to fill the last block. When this happens, a padding string is added to the text. For example, if the block length is 64 bits and the last block contains only 40 bits, 24 bits of padding are added. See the <xref:System.Security.Cryptography.PaddingMode> enumeration for a description of specific modes.

 This field is accessed through the <xref:System.Security.Cryptography.SymmetricAlgorithm.Padding%2A> property.

 ]]></format>
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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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## Remarks

This member is an explicit interface member implementation. It can be used only when the <xref:System.Security.Cryptography.SymmetricAlgorithm> instance is cast to an <xref:System.IDisposable> interface.

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        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
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      <MemberSignature Language="VB.NET" Value="Public Function TryDecryptCbc (ciphertext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), ByRef bytesWritten As Integer, Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.PKCS7) As Boolean" />
      <MemberSignature Language="F#" Value="member this.TryDecryptCbc : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * int * System.Security.Cryptography.PaddingMode -&gt; bool" Usage="symmetricAlgorithm.TryDecryptCbc (ciphertext, iv, destination, bytesWritten, paddingMode)" />
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      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
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      <Parameters>
        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="4" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the plaintext data.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Attempts to decrypt data into the specified buffer, using CBC mode with the specified padding mode.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the decrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptCbcCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.</exception>
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    <Member MemberName="TryDecryptCbcCore">
      <MemberSignature Language="C#" Value="protected virtual bool TryDecryptCbcCore (ReadOnlySpan&lt;byte&gt; ciphertext, ReadOnlySpan&lt;byte&gt; iv, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode, out int bytesWritten);" />
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      <MemberSignature Language="VB.NET" Value="Protected Overridable Function TryDecryptCbcCore (ciphertext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), paddingMode As PaddingMode, ByRef bytesWritten As Integer) As Boolean" />
      <MemberSignature Language="F#" Value="abstract member TryDecryptCbcCore : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int -&gt; bool&#xA;override this.TryDecryptCbcCore : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int -&gt; bool" Usage="symmetricAlgorithm.TryDecryptCbcCore (ciphertext, iv, destination, paddingMode, bytesWritten)" />
      <MemberSignature Language="C++ CLI" Value="protected:&#xA; virtual bool TryDecryptCbcCore(ReadOnlySpan&lt;System::Byte&gt; ciphertext, ReadOnlySpan&lt;System::Byte&gt; iv, Span&lt;System::Byte&gt; destination, System::Security::Cryptography::PaddingMode paddingMode, [Runtime::InteropServices::Out] int % bytesWritten);" />
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        <ReturnType>System.Boolean</ReturnType>
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      <Parameters>
        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="4" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the plaintext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <summary>When overridden in a derived class, attempts to decrypt data into the specified buffer, using CBC mode with the specified padding mode.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the decrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

Derived classes must override this and provide an implementation.

          ]]></format>
        </remarks>
        <exception cref="T:System.NotSupportedException">A derived class has not provided an implementation.</exception>
      </Docs>
    </Member>
    <Member MemberName="TryDecryptCfb">
      <MemberSignature Language="C#" Value="public bool TryDecryptCfb (ReadOnlySpan&lt;byte&gt; ciphertext, ReadOnlySpan&lt;byte&gt; iv, Span&lt;byte&gt; destination, out int bytesWritten, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.None, int feedbackSizeInBits = 8);" />
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      <MemberSignature Language="VB.NET" Value="Public Function TryDecryptCfb (ciphertext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), ByRef bytesWritten As Integer, Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.None, Optional feedbackSizeInBits As Integer = 8) As Boolean" />
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        <ReturnType>System.Boolean</ReturnType>
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      <Parameters>
        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="4" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="feedbackSizeInBits" Type="System.Int32" Index="5" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the plaintext data.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="feedbackSizeInBits">The feedback size, specified in bits.</param>
        <summary>Attempts to decrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the decrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptCfbCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.

-or-

<paramref name="feedbackSizeInBits" /> is not positive or represent a whole number of bytes.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.

-or-

<paramref name="feedbackSizeInBits" /> is not valid for the algorithm.</exception>
      </Docs>
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    <Member MemberName="TryDecryptCfbCore">
      <MemberSignature Language="C#" Value="protected virtual bool TryDecryptCfbCore (ReadOnlySpan&lt;byte&gt; ciphertext, ReadOnlySpan&lt;byte&gt; iv, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode, int feedbackSizeInBits, out int bytesWritten);" />
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        <ReturnType>System.Boolean</ReturnType>
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      <Parameters>
        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="feedbackSizeInBits" Type="System.Int32" Index="4" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="5" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the plaintext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="feedbackSizeInBits">The feedback size, specified in bits.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <summary>When overridden in a derived class, attempts to decrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the decrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

Derived classes must override this and provide an implementation.

          ]]></format>
        </remarks>
        <exception cref="T:System.NotSupportedException">A derived class has not provided an implementation.</exception>
      </Docs>
    </Member>
    <Member MemberName="TryDecryptEcb">
      <MemberSignature Language="C#" Value="public bool TryDecryptEcb (ReadOnlySpan&lt;byte&gt; ciphertext, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode, out int bytesWritten);" />
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      <Parameters>
        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="destination">The buffer to receive the plaintext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <summary>Attempts to decrypt data into the specified buffer, using ECB mode with the specified padding mode.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the decrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryDecryptEcbCore(System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The ciphertext could not be decrypted successfully.</exception>
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    <Member MemberName="TryDecryptEcbCore">
      <MemberSignature Language="C#" Value="protected virtual bool TryDecryptEcbCore (ReadOnlySpan&lt;byte&gt; ciphertext, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode, out int bytesWritten);" />
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      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="ciphertext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="ciphertext">The data to decrypt.</param>
        <param name="destination">The buffer to receive the plaintext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <summary>When overridden in a derived class, attempts to decrypt data into the specified buffer, using ECB mode with the specified padding mode.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the decrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

Derived classes must override this and provide an implementation.

          ]]></format>
        </remarks>
        <exception cref="T:System.NotSupportedException">A derived class has not provided an implementation.</exception>
      </Docs>
    </Member>
    <Member MemberName="TryEncryptCbc">
      <MemberSignature Language="C#" Value="public bool TryEncryptCbc (ReadOnlySpan&lt;byte&gt; plaintext, ReadOnlySpan&lt;byte&gt; iv, Span&lt;byte&gt; destination, out int bytesWritten, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.PKCS7);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance bool TryEncryptCbc(valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; plaintext, valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; iv, valuetype System.Span`1&lt;unsigned int8&gt; destination, [out] int32&amp; bytesWritten, valuetype System.Security.Cryptography.PaddingMode paddingMode) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCbc(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Int32@,System.Security.Cryptography.PaddingMode)" />
      <MemberSignature Language="VB.NET" Value="Public Function TryEncryptCbc (plaintext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), ByRef bytesWritten As Integer, Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.PKCS7) As Boolean" />
      <MemberSignature Language="F#" Value="member this.TryEncryptCbc : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * int * System.Security.Cryptography.PaddingMode -&gt; bool" Usage="symmetricAlgorithm.TryEncryptCbc (plaintext, iv, destination, bytesWritten, paddingMode)" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
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        <AssemblyName>System.Security.Cryptography</AssemblyName>
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      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="4" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the ciphertext data.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <summary>Attempts to encrypt data into the specified buffer, using CBC mode with the specified padding mode.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the encrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCbcCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.</exception>
      </Docs>
    </Member>
    <Member MemberName="TryEncryptCbcCore">
      <MemberSignature Language="C#" Value="protected virtual bool TryEncryptCbcCore (ReadOnlySpan&lt;byte&gt; plaintext, ReadOnlySpan&lt;byte&gt; iv, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode, out int bytesWritten);" />
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      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCbcCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)" />
      <MemberSignature Language="VB.NET" Value="Protected Overridable Function TryEncryptCbcCore (plaintext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), paddingMode As PaddingMode, ByRef bytesWritten As Integer) As Boolean" />
      <MemberSignature Language="F#" Value="abstract member TryEncryptCbcCore : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int -&gt; bool&#xA;override this.TryEncryptCbcCore : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int -&gt; bool" Usage="symmetricAlgorithm.TryEncryptCbcCore (plaintext, iv, destination, paddingMode, bytesWritten)" />
      <MemberSignature Language="C++ CLI" Value="protected:&#xA; virtual bool TryEncryptCbcCore(ReadOnlySpan&lt;System::Byte&gt; plaintext, ReadOnlySpan&lt;System::Byte&gt; iv, Span&lt;System::Byte&gt; destination, System::Security::Cryptography::PaddingMode paddingMode, [Runtime::InteropServices::Out] int % bytesWritten);" />
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      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
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      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="4" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the ciphertext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <summary>When overridden in a derived class, attempts to encrypt data into the specified buffer, using CBC mode with the specified padding mode.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the encrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

Derived classes must override this and provide an implementation.


Implementations of this method must write precisely
                 `GetCiphertextLengthCbc(plaintext.Length, paddingMode)` bytes to `destination`
                 and report that via `bytesWritten`.




          ]]></format>
        </remarks>
        <exception cref="T:System.NotSupportedException">A derived class has not provided an implementation.</exception>
      </Docs>
    </Member>
    <Member MemberName="TryEncryptCfb">
      <MemberSignature Language="C#" Value="public bool TryEncryptCfb (ReadOnlySpan&lt;byte&gt; plaintext, ReadOnlySpan&lt;byte&gt; iv, Span&lt;byte&gt; destination, out int bytesWritten, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.None, int feedbackSizeInBits = 8);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance bool TryEncryptCfb(valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; plaintext, valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; iv, valuetype System.Span`1&lt;unsigned int8&gt; destination, [out] int32&amp; bytesWritten, valuetype System.Security.Cryptography.PaddingMode paddingMode, int32 feedbackSizeInBits) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCfb(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Int32@,System.Security.Cryptography.PaddingMode,System.Int32)" />
      <MemberSignature Language="VB.NET" Value="Public Function TryEncryptCfb (plaintext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), ByRef bytesWritten As Integer, Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.None, Optional feedbackSizeInBits As Integer = 8) As Boolean" />
      <MemberSignature Language="F#" Value="member this.TryEncryptCfb : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * int * System.Security.Cryptography.PaddingMode * int -&gt; bool" Usage="symmetricAlgorithm.TryEncryptCfb (plaintext, iv, destination, bytesWritten, paddingMode, feedbackSizeInBits)" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography.Primitives</AssemblyName>
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        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="4" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="feedbackSizeInBits" Type="System.Int32" Index="5" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the ciphertext data.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="feedbackSizeInBits">The feedback size, specified in bits.</param>
        <summary>Attempts to encrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the encrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCfbCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.

-or-

<paramref name="feedbackSizeInBits" /> is not positive or represent a whole number of bytes.</exception>
        <exception cref="T:System.ArgumentException">
          <paramref name="iv" /> is the incorrect length. Callers are expected to pass an initialization vector that is exactly <see cref="P:System.Security.Cryptography.SymmetricAlgorithm.BlockSize" /> in length, converted to bytes (<c>BlockSize / 8</c>).</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.

-or-

The feedback size is not valid for the algorithm.</exception>
      </Docs>
    </Member>
    <Member MemberName="TryEncryptCfbCore">
      <MemberSignature Language="C#" Value="protected virtual bool TryEncryptCfbCore (ReadOnlySpan&lt;byte&gt; plaintext, ReadOnlySpan&lt;byte&gt; iv, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode, int feedbackSizeInBits, out int bytesWritten);" />
      <MemberSignature Language="ILAsm" Value=".method familyhidebysig newslot virtual instance bool TryEncryptCfbCore(valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; plaintext, valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; iv, valuetype System.Span`1&lt;unsigned int8&gt; destination, valuetype System.Security.Cryptography.PaddingMode paddingMode, int32 feedbackSizeInBits, [out] int32&amp; bytesWritten) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptCfbCore(System.ReadOnlySpan{System.Byte},System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32,System.Int32@)" />
      <MemberSignature Language="VB.NET" Value="Protected Overridable Function TryEncryptCfbCore (plaintext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), paddingMode As PaddingMode, feedbackSizeInBits As Integer, ByRef bytesWritten As Integer) As Boolean" />
      <MemberSignature Language="F#" Value="abstract member TryEncryptCfbCore : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int * int -&gt; bool&#xA;override this.TryEncryptCfbCore : ReadOnlySpan&lt;byte&gt; * ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int * int -&gt; bool" Usage="symmetricAlgorithm.TryEncryptCfbCore (plaintext, iv, destination, paddingMode, feedbackSizeInBits, bytesWritten)" />
      <MemberSignature Language="C++ CLI" Value="protected:&#xA; virtual bool TryEncryptCfbCore(ReadOnlySpan&lt;System::Byte&gt; plaintext, ReadOnlySpan&lt;System::Byte&gt; iv, Span&lt;System::Byte&gt; destination, System::Security::Cryptography::PaddingMode paddingMode, int feedbackSizeInBits, [Runtime::InteropServices::Out] int % bytesWritten);" />
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      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
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      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="iv" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="feedbackSizeInBits" Type="System.Int32" Index="4" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="5" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="iv">The initialization vector.</param>
        <param name="destination">The buffer to receive the ciphertext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="feedbackSizeInBits">The feedback size, specified in bits.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <summary>When overridden in a derived class, attempts to encrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the encrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

Derived classes must override this and provide an implementation.


Implementations of this method must write precisely
                 `GetCiphertextLengthCfb(plaintext.Length, paddingMode, feedbackSizeInBits)`
                 bytes to `destination` and report that via `bytesWritten`.




          ]]></format>
        </remarks>
        <exception cref="T:System.NotSupportedException">A derived class has not provided an implementation.</exception>
      </Docs>
    </Member>
    <Member MemberName="TryEncryptEcb">
      <MemberSignature Language="C#" Value="public bool TryEncryptEcb (ReadOnlySpan&lt;byte&gt; plaintext, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode, out int bytesWritten);" />
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      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
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      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="destination">The buffer to receive the ciphertext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <summary>Attempts to encrypt data into the specified buffer, using ECB mode with the specified padding mode.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the encrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method's behavior is defined by <xref:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptEcbCore(System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)>.

          ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="paddingMode" /> is not a valid padding mode.</exception>
        <exception cref="T:System.Security.Cryptography.CryptographicException">The plaintext could not be encrypted successfully.</exception>
      </Docs>
    </Member>
    <Member MemberName="TryEncryptEcbCore">
      <MemberSignature Language="C#" Value="protected virtual bool TryEncryptEcbCore (ReadOnlySpan&lt;byte&gt; plaintext, Span&lt;byte&gt; destination, System.Security.Cryptography.PaddingMode paddingMode, out int bytesWritten);" />
      <MemberSignature Language="ILAsm" Value=".method familyhidebysig newslot virtual instance bool TryEncryptEcbCore(valuetype System.ReadOnlySpan`1&lt;unsigned int8&gt; plaintext, valuetype System.Span`1&lt;unsigned int8&gt; destination, valuetype System.Security.Cryptography.PaddingMode paddingMode, [out] int32&amp; bytesWritten) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.TryEncryptEcbCore(System.ReadOnlySpan{System.Byte},System.Span{System.Byte},System.Security.Cryptography.PaddingMode,System.Int32@)" />
      <MemberSignature Language="VB.NET" Value="Protected Overridable Function TryEncryptEcbCore (plaintext As ReadOnlySpan(Of Byte), destination As Span(Of Byte), paddingMode As PaddingMode, ByRef bytesWritten As Integer) As Boolean" />
      <MemberSignature Language="F#" Value="abstract member TryEncryptEcbCore : ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int -&gt; bool&#xA;override this.TryEncryptEcbCore : ReadOnlySpan&lt;byte&gt; * Span&lt;byte&gt; * System.Security.Cryptography.PaddingMode * int -&gt; bool" Usage="symmetricAlgorithm.TryEncryptEcbCore (plaintext, destination, paddingMode, bytesWritten)" />
      <MemberSignature Language="C++ CLI" Value="protected:&#xA; virtual bool TryEncryptEcbCore(ReadOnlySpan&lt;System::Byte&gt; plaintext, Span&lt;System::Byte&gt; destination, System::Security::Cryptography::PaddingMode paddingMode, [Runtime::InteropServices::Out] int % bytesWritten);" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography.Primitives</AssemblyName>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography</AssemblyName>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
        <AssemblyVersion>8.0.0.0</AssemblyVersion>
        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="plaintext" Type="System.ReadOnlySpan&lt;System.Byte&gt;" Index="0" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="destination" Type="System.Span&lt;System.Byte&gt;" Index="1" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="paddingMode" Type="System.Security.Cryptography.PaddingMode" Index="2" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
        <Parameter Name="bytesWritten" Type="System.Int32" RefType="out" Index="3" FrameworkAlternate="net-10.0;net-6.0;net-7.0;net-8.0;net-9.0" />
      </Parameters>
      <Docs>
        <param name="plaintext">The data to encrypt.</param>
        <param name="destination">The buffer to receive the ciphertext data.</param>
        <param name="paddingMode">The padding mode used to produce the ciphertext and remove during decryption.</param>
        <param name="bytesWritten">When this method returns, contains the total number of bytes written to <paramref name="destination" />.</param>
        <summary>When overridden in a derived class, attempts to encrypt data into the specified buffer, using ECB mode with the specified padding mode.</summary>
        <returns>
          <see langword="true" /> if <paramref name="destination" /> was large enough to receive the encrypted data; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

Derived classes must override this and provide an implementation.


Implementations of this method must write precisely
                 `GetCiphertextLengthEcb(plaintext.Length, paddingMode)` bytes to `destination`
                 and report that via `bytesWritten`.




          ]]></format>
        </remarks>
        <exception cref="T:System.NotSupportedException">A derived class has not provided an implementation.</exception>
      </Docs>
    </Member>
    <Member MemberName="ValidKeySize">
      <MemberSignature Language="C#" Value="public bool ValidKeySize (int bitLength);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance bool ValidKeySize(int32 bitLength) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Security.Cryptography.SymmetricAlgorithm.ValidKeySize(System.Int32)" />
      <MemberSignature Language="VB.NET" Value="Public Function ValidKeySize (bitLength As Integer) As Boolean" />
      <MemberSignature Language="F#" Value="member this.ValidKeySize : int -&gt; bool" Usage="symmetricAlgorithm.ValidKeySize bitLength" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; bool ValidKeySize(int bitLength);" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>mscorlib</AssemblyName>
        <AssemblyVersion>1.0.5000.0</AssemblyVersion>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.0.5.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
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      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.1.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography.Primitives</AssemblyName>
        <AssemblyVersion>4.1.0.0</AssemblyVersion>
        <AssemblyVersion>4.1.1.0</AssemblyVersion>
        <AssemblyVersion>4.1.2.0</AssemblyVersion>
        <AssemblyVersion>5.0.0.0</AssemblyVersion>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>System.Security.Cryptography</AssemblyName>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
        <AssemblyVersion>8.0.0.0</AssemblyVersion>
        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="bitLength" Type="System.Int32" Index="0" FrameworkAlternate="net-10.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netframework-1.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-2.0;netstandard-2.1" />
      </Parameters>
      <Docs>
        <param name="bitLength">The length, in bits, to check for a valid key size.</param>
        <summary>Determines whether the specified key size is valid for the current algorithm.</summary>
        <returns>
          <see langword="true" /> if the specified key size is valid for the current algorithm; otherwise, <see langword="false" />.</returns>
        <remarks>To be added.</remarks>
        <related type="Article" href="/dotnet/standard/security/cryptographic-services">Cryptographic Services</related>
      </Docs>
    </Member>
  </Members>
</Type>