title: how do you implement System.Net.IPAddress.HostToNetworkOder and NetworkToHostOrder
body: <p>The <code>HostToNetworkOrder</code> method converts multibyte integer values stored on the host system from the byte order used by the host to the byte order used by the network, and the <code>NetworkToHostOrder</code> does the reverse.</p>
  
  <p>Question is how to implement these methods in C#, assuming that it is not available in the system library.</p>