title: Sending a byte array to a serial port using certain formatting
body: <p>Bit of a weird one here but I'm trying to write a control program for a monitor that uses a serial RS232 port to receive commands in hexadecimal, 0xFF, notation i.e. 0x00.</p>
  
  <p>Problem I have is that I can't seem to find a way of taking a user input, which is a decimal value like 55, and converting it into its byte, hexadecimal, form with the above mentioned format. Using the Convert method that Visual studio has built in gives me the correct value i need but without the required 0x at the beginning.</p>
  
  <p>I'm new to using bytes and byte arrays in C# so forgive me if I've missed out on a simple formatting method that will solve it.</p>
  
  <p>Below is a string to byte array method that I found on here and its helpful but gives me the wrong format for the bytes.</p>
  
  <pre><code>private static byte[] StringToByteArray(String hex)
          {
              int NumberChars = hex.Length;
              byte[] bytes = new byte[NumberChars / 2];
              for (int i = 0; i &lt; NumberChars; i += 2)
                  bytes[i / 2] = Convert.ToByte(hex.Substring(i+2, 2), 16);
              return bytes;
          }
  </code></pre>