代码段：ASCII to Unicode

   1: private string ConvertAsciiToUnicode(string theAsciiString)

   2:  {

   3:     // Create two different encodings.

   4:     Encoding aAsciiEncoding = Encoding.ASCII;

   5:     Encoding aUnicodeEncoding = Encoding.Unicode;

   6:  

   7:     // Convert the string into a byte[].

   8:     byte[] aAsciiBytes = aAsciiEncoding.GetBytes(theAsciiString);

   9:  

  10:     // Perform the conversion from one encoding to the other.

  11:     byte[] aUnicodeBytes = Encoding.Convert(aAsciiEncoding, aUnicodeEncoding,

  12:     aAsciiBytes);

  13:  

  14:     // Convert the new byte[] into a char[] and then into a string.

  15:     char[] aUnicodeChars = new

  16:     char[aUnicodeEncoding.GetCharCount(aUnicodeBytes, 0, aUnicodeBytes.Length)];

  17:     aUnicodeEncoding.GetChars(aUnicodeBytes, 0, aUnicodeBytes.Length,

  18:     aUnicodeChars, 0);

  19:     string aUnicodeString = new string(aUnicodeChars);

  20:  

  21:     return aUnicodeString;

  22: }