Question : Most Efficient Way Of Appending to a Byte[]

Hi

I am trying to build up a byte[], the data consists of a start byte followed by an xml message, followed by an end byte .

I am using the following snippet of code to append the start and end bytes to my byte[] which initially only has the xml data. I pass in the string containing the xml and return a byte[] containing the complete message.

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private byte[] FormatKeyPadMessage(string xmlMessage)
        {
            try
            {
                byte[] byteMessage = new byte[4096];
                byte[] startChar = new byte[1];
                byte[] endChar = new byte[1];

                startChar[0] = 0x02;
                endChar[0] = 0x03;

                byteMessage = StrToByteArray(xmlMessage);

                int arraySize = byteMessage.Length + 3;

                var ms = new MemoryStream(new byte[arraySize], 0, arraySize, true, true);
                ms.Write(startChar, 0, 1);
                ms.Write(byteMessage, 0, byteMessage.Length);
                ms.Write(endChar, 0, 1);

                byte[] mergedMessage = ms.GetBuffer();

                return mergedMessage;
            }
            catch (Exception ex)
            {
                
                return null;
            }
        }

This works, but the functions seems to be innificient and I was wondering if their is a better way of doing this.

Any help appreciated
Regards

Answer : Most Efficient Way Of Appending to a Byte[]

I have written a guide here on the exact process here: http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_2881-Migrate-Small-Business-Server-2003-to-Exchange-2010-and-Windows-2008-R2.html