how to read unicode datas from mysql and save it to xml file?

suggest the data you read from mysql is store in char[] sa and it is a UniCode

char [] sa;
string s

//some code to receive data in s or sa
//you can change s to sa by your demand

Encoder UniCodeEncoder = Encoding.UniCode.GetEncoder();

int byteCount = UniCodeEncoder.GetByteCount(s, 0, s.Length, true);
Byte[] bytes = new Byte[byteCount];
int bytesEncodedCount = UniCodeEncoder.GetBytes(s, 0,s.Length, bytes, 0, true);
//ok it change to UniCode
// bytesEncodedCount is the real changed bytes number
 Console.WriteLine("{0} bytes used to encode characters.", bytesEncodedCount );
//show the encoded bytes
Console.Write("Encoded bytes: ");
  foreach (Byte b in s) {
        Console.Write("[{0}]", b);
   }//the result is save in bytes

thankz for reply.
i found out that, its because of bytefx, bytefx depends on mysql's server character, and mysql uses latin, that's why it can't read when the character set doesn't match the default character set,, i give myself 250 points :)