how to convert ascii value to hexa value

'x' or 'x' means express the number in hexadecimal string format. If it's a lower case 'x', then the hex digits higher than 9 (i.e. abcdef) appear in lower case . If it's an upper case 'X', then they appear as 'ABCDEF'.

The '2' means express as (at least) two hex digits and use a leading zero if there's only one digit required to express the number. For example decimal 15 would be expressed as 0F using the 'X2' format.

thank u allan,

 hex[i] = dec[i].ToString("x2");

i think x2 means string format

 plz give me explanation abt x2

Try this:

       string name = "abcdef";
       byte[] dec = new byte[name.Length];
       string[] hex = new string[name.Length];
       dec = Encoding.ASCII.GetBytes(name);
       for(int i = 0; i < dec.Length ; i++) 
       {
         hex[i] = dec[i].ToString("X2");
       }

       foreach(string h in hex)
       {
          Console.Write("{0} ", h);
       }