title: Socket Exception when Connecting from Phone
body: <p>I try to do an example about client-server Windows Phone app
  but when I debug code, there is a error </p>
  
  <blockquote>
    <p>An unhandled exception of type 'System.Net.Sockets.SocketException'
    occurred in System.dll</p>
    
    <p>Additional information: No connection could be made because the target
    machine actively refused it</p>
    
    <p>If there is a handler for this exception, the program may be safely
    continued.</p>
  </blockquote>
  
  <p>What should I do? </p>