C# | Convert.ToByte(String, IFormatProvider) Method

Last Updated : 11 Jul, 2025

This method is used to convert the specified string representation of a number to an equivalent 8-bit unsigned integer, using specified culture-specific formatting information.
Syntax:

public static byte ToByte (string value, IFormatProvider provider);

Parameters:

value: It is a string that contains the number to convert.
provider: It is an object that supplies culture-specific formatting information.

Return Value: This method returns an 8-bit unsigned integer that is equivalent to value, or zero if value is null.
Exceptions:

FormatException: If the value does not consist of an optional sign followed by a sequence of digits (0 through 9).
OverflowException: If the value represents a number that is less than MinValue or greater than MaxValue.

Below programs illustrate the use of Convert.ToByte(String, IFormatProvider) Method:
Example 1:

csharp

// C# program to demonstrate the
// Convert.ToByte() Method
using System;
using System.Globalization;
class GFG {

// Main Method
public static void Main()
{
    try {
        
        // creating object of CultureInfo
        CultureInfo cultures = new CultureInfo("en-US");

        // declaring and initializing String array
        string[] values = { "234", "+234", "240", 
                           "255", "140", "120" };

        // calling get() Method
        Console.WriteLine("Converted bool value "+
                        "of specified strings: ");
                        
        for (int j = 0; j < values.Length; j++) {
            
            get(values[j], cultures);
        }
    }
    
    catch (FormatException e) {
        
        Console.WriteLine("\n");
        Console.Write("Exception Thrown: ");
        Console.Write("{0}", e.GetType(), e.Message);
    }
    catch (OverflowException e) {
        
        Console.WriteLine("\n");
        Console.Write("Exception Thrown: ");
        Console.Write("{0}", e.GetType(), e.Message);
    }
}

// Defining get() method
public static void get(string s, CultureInfo cultures)
{

    // converting string to specified bool
    byte val = Convert.ToByte(s, cultures);

    // display the converted string
    Console.Write(" {0}, ", val);
}
}

Output:

Converted bool value of specified strings: 
 234,  234,  240,  255,  140,  120,

Example 2: For FormatException

csharp

// C# program to demonstrate the
// Convert.ToByte() Method
using System;
using System.Globalization;
class GFG {

// Main Method
public static void Main()
{
    try {
        
        // creating object of CultureInfo
        CultureInfo cultures = new CultureInfo("en-US");

        // declaring and initializing String array
        string[] values = {"234", "+234", "240",
                             "255", "140", "A"};

        // calling get() Method
        Console.WriteLine("]n Converted bool value "+
                           "of specified strings: ");
                           
        for (int j = 0; j < values.Length; j++) {
            get(values[j], cultures);
        }
    }
    
    catch (FormatException e) {
        
        Console.WriteLine("\n\nvalue consist invalid format");
        Console.Write("Exception Thrown: ");
        Console.Write("{0}", e.GetType(), e.Message);
    }
    
    catch (OverflowException e) {
        
        Console.WriteLine("\n value represents a "+
              "number that is less than MinValue");
              
        Console.Write("Exception Thrown: ");
        Console.Write("{0}", e.GetType(), e.Message);
    }
}

// Defining get() method
public static void get(string s,
           CultureInfo cultures)
{

    // converting string to specified bool
    byte val = Convert.ToByte(s, cultures);

    // display the converted string
    Console.Write(" {0}, ", val);
}
}

Output:

]n Converted bool value of specified strings: 
 234,  234,  240,  255,  140, 

value consist invalid format
Exception Thrown: System.FormatException

Example 3: For OverflowException

csharp

// C# program to demonstrate the
// Convert.ToByte() Method
using System;
using System.Globalization;

class GFG {

// Main Method
public static void Main()
{
    try {
        
        // creating object of CultureInfo
        CultureInfo cultures = new CultureInfo("en-US");

        // declaring and initializing String array
        string[] values = {"234", "+234", "240",
                           "255", "140", "-1" };

        // calling get() Method
        Console.WriteLine("]n Converted bool value"+
                         " of specified strings: ");
                         
        for (int j = 0; j < values.Length; j++) {
            get(values[j], cultures);
        }
    }
    
    catch (FormatException e) {
        
        Console.WriteLine("\n\nvalue consist invalid format");
        Console.Write("Exception Thrown: ");
        Console.Write("{0}", e.GetType(), e.Message);
    }
    
    catch (OverflowException e) {
        
        Console.WriteLine("\n\nvalue represents a number"+
                           " that is less than MinValue");
        Console.Write("Exception Thrown: ");
        Console.Write("{0}", e.GetType(), e.Message);
    }
}

// Defining get() method
public static void get(string s, CultureInfo cultures)
{

    // converting string to specified bool
    byte val = Convert.ToByte(s, cultures);

    // display the converted string
    Console.Write(" {0}, ", val);
}
}

Output:

]n Converted bool value of specified strings: 
 234,  234,  240,  255,  140, 

value represents a number that is less than MinValue
Exception Thrown: System.OverflowException

Reference:

https://learn.microsoft.com/en-us/dotnet/api/system.convert.tobyte?view=netframework-4.7.2#System_Convert_ToByte_System_String_System_IFormatProvider_

Introduction to .NET Framework

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C# | Convert.ToByte(String, IFormatProvider) Method

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