Converting Hex Strings

HexStringConversiond.cs

private static byte[] HexStringToByteArray(string input) {
 
           byte[] Bytes;
 
           int ByteLength;
 
           string HexValue = "\x0\x1\x2\x3\x4\x5\x6\x7\x8\x9|||||||\xA\xB\xC\xD\xE\xF";
 
           ByteLength = input.Length / 2;
 
           Bytes = new byte[ByteLength];
 
           for (int x = 0, i = 0; i < input.Length; i += 2, x += 1)
 
           {
                      Bytes[x] = (byte)(HexValue[Char.ToUpper(input[i + 0]) - '0'] << 4);
                      Bytes[x] |= (byte)(HexValue[Char.ToUpper(input[i + 1]) - '0']);
           }
 
           return Bytes;
}

public string ConvertStringToHex(string input)
{
    // Take our input and break it into an array
    char[] arrInput = input.ToCharArray();
    String result = String.Empty;
 
    // For each set of characters
    foreach (char element in arrInput)
    {
        // My lazy way of dealing with whether or not anything had been added yet
        if (String.IsNullOrEmpty(result))
        {
           result = String.Format("{0:X2}", Convert.ToUInt16(element)).ToString();
        }
        else {
            result += String.Format("{0:X2}", Convert.ToUInt16(element)).ToString();
        }
 
    }
    return result.ToString();
}