You can use an Encoding object to encode a byte array.
GetBytes method converts from string to byte[] with the given encoding.
GetString method converts from byte[] to string:
using System; class MainClass//from w w w .j a v a 2 s .c o m { public static void Main(string[] args) { byte[] utf8Bytes = System.Text.Encoding.UTF8.GetBytes ("0123456789"); byte[] utf16Bytes = System.Text.Encoding.Unicode.GetBytes ("book2s.com"); byte[] utf32Bytes = System.Text.Encoding.UTF32.GetBytes ("this is a test"); Console.WriteLine (utf8Bytes.Length); Console.WriteLine (utf16Bytes.Length); Console.WriteLine (utf32Bytes.Length); string original1 = System.Text.Encoding.UTF8.GetString (utf8Bytes); string original2 = System.Text.Encoding.Unicode.GetString (utf16Bytes); string original3 = System.Text.Encoding.UTF32.GetString (utf32Bytes); Console.WriteLine (original1); Console.WriteLine (original2); Console.WriteLine (original3); } }