File.WriteAllText(String, String, Encoding) Method in C# with Examples Last Updated : 01 Jun, 2020 Comments Improve Suggest changes Like Article Like Report File.WriteAllText(String, String, Encoding) is an inbuilt File class method that is used to create a new file, writes the specified string to the file using the specified encoding, and then closes the file. If the target file already exists, it is overwritten. Syntax: public static void WriteAllText (string path, string contents, System.Text.Encoding encoding); Parameter: This function accepts three parameters which are illustrated below: path: This is the specified file where specified string are going to be written. contents: This is the specified string to write to the file. encoding: This is the specified encoding to apply to the string. Exceptions: ArgumentException: The path is a zero-length string, contains only white space, or one or more invalid characters as defined by InvalidPathChars. ArgumentNullException: The path is null. PathTooLongException: The specified path, file name, or both exceed the system-defined maximum length. DirectoryNotFoundException: The specified path is invalid. IOException: An I/O error occurred while opening the file. UnauthorizedAccessException: The path specified a file that is read-only. OR the path specified a file that is hidden. OR this operation is not supported on the current platform. OR the path specified a directory. OR the caller does not have the required permission. NotSupportedException: The path is in an invalid format. SecurityException: The caller does not have the required permission. Below are the programs to illustrate the File.WriteAllText(String, String) method. Program 1: Initially, no file was created. Below code itself create a file file.txt and write the specified string array into the file. CSharp // C# program to illustrate the usage // of File.WriteAllText(String, String, // Encoding) method // Using System, System.IO and // System.Text namespaces using System; using System.IO; using System.Text; class GFG { public static void Main() { // Specifying a file string path = @"file.txt"; // Creating a string string createText = "GeeksforGeeks" + Environment.NewLine; // Writing the string to the file File.WriteAllText(path, createText, Encoding.UTF8); // Reading the contents of the file string readText = File.ReadAllText(path, Encoding.UTF8); Console.WriteLine(readText); } } Output: GeeksforGeeks After running the above code, the above output is shown, and a new file file.txt is created shown below- Program 2: Initially, a file file.txt is created with some contents shown below- Below code overwrites the file contents with the specified string. CSharp // C# program to illustrate the usage // of File.WriteAllText(String, String, // Encoding) method // Using System, System.IO and // System.Text namespaces using System; using System.IO; using System.Text; class GFG { public static void Main() { // Specifying a file string path = @"file.txt"; // Creating a string string createText = "GFG is a cs portal." + Environment.NewLine; // Overwriting the string to the file File.WriteAllText(path, createText, Encoding.UTF8); // Reading the contents of the file string readText = File.ReadAllText(path, Encoding.UTF8); Console.WriteLine(readText); } } Output: GFG is a cs portal. After running the above code, the above output is shown, and the file file.txt contents became like shown below: Comment More infoAdvertise with us Next Article File.WriteAllText(String, String, Encoding) Method in C# with Examples K Kanchan_Ray Follow Improve Article Tags : C# CSharp-File-Handling Similar Reads File.WriteAllLines(String, String[], Encoding) Method in C# with Examples File.WriteAllLines(String, String[], Encoding) is an inbuilt File class method that is used to create a new file, writes the specified string array to the file by using the specified encoding, and then closes the file.Syntax: public static void WriteAllLines (string path, string[] contents, System. 3 min read File.WriteAllText(String, String) Method in C# with Examples File.WriteAllText(String, String) is an inbuilt File class method that is used to create a new file, writes the specified string to the file, and then closes the file. If the target file already exists, it is overwritten. 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