Try This #region public static byte[] ConvertAsciiToEbcdic(byte[] asciiData) public static byte[] ConvertAsciiToEbcdic(byte[] asciiData) { // Create two different encodings. Encoding ascii = Encoding.ASCII; Encoding ebcdic = Encoding.GetEncoding("IBM037"); //Retutn Ebcdic Data return Encoding.Convert(ascii, ebcdic, asciiData); } #endregion #region public static byte[] ConvertEbcdicToAscii(byte[] ebcdicData) public static byte[] ConvertEbcdicToAscii(byte[] ebcdicData) { // Create two different encodings. Encoding ascii = Encoding.ASCII; Encoding ebcdic = Encoding.GetEncoding("IBM037"); //Retutn Ascii Data return Encoding.Convert(ebcdic, ascii, ebcdicData); } #endregion