Encoding.UTF32
using System; public class MainClass { public static void Main() { byte[] utf8Bytes = System.Text.Encoding.UTF8.GetBytes("0123456789"); byte[] utf16Bytes = System.Text.Encoding.Unicode.GetBytes("0123456789"); byte[] utf32Bytes = System.Text.Encoding.UTF32.GetBytes("0123456789"); Console.WriteLine(utf8Bytes.Length); Console.WriteLine(utf16Bytes.Length); Console.WriteLine(utf32Bytes.Length); } }