try {
 
//Create a StreamSocketListener to start listening for TCP connections. 
   Windows.Networking.Sockets.StreamSocketListener socketListener = new 
      Windows.Networking.Sockets.StreamSocketListener(); 
                      
//Hook up an event handler to call when connections are received. 
   socketListener.ConnectionReceived += SocketListener_ConnectionReceived;
   
//Start listening for incoming TCP connections on the specified port. 
   You can specify any port that's not currently in use. 
    
   await socketListener.BindServiceNameAsync("1337"); 
} catch (Exception e) {
   //Handle exception. 
}

private async void SocketListener_ConnectionReceived(
   Windows.Networking.Sockets.StreamSocketListen er sender, 
   Windows.Networking.Sockets.StreamSocketListenerConnectionReceivedEventArgs args){ 
 
   //Read line from the remote client. 
   Stream inStream = args.Socket.InputStream.AsStreamForRead(); 
   StreamReader reader = new StreamReader(inStream); 
   string request = await reader.ReadLineAsync(); 
    
   //Send the line back to the remote client. 
   Stream outStream = args.Socket.OutputStream.AsStreamForWrite(); 
   StreamWriter writer = new StreamWriter(outStream); 
    
   await writer.WriteLineAsync(request); 
   await writer.FlushAsync(); 
}

MessageWebSocket webSock = new MessageWebSocket(); 
 
//In this case we will be sending/receiving a string so we need to 
   set the MessageType to Utf8. 
webSock.Control.MessageType = SocketMessageType.Utf8;  

//Add the MessageReceived event handler. 
webSock.MessageReceived += WebSock_MessageReceived;  

//Add the Closed event handler. 
webSock.Closed += WebSock_Closed; 
 
Uri serverUri = new Uri("wss://echo.websocket.org");
  
try {
   //Connect to the server. 
   await webSock.ConnectAsync(serverUri);
    
   //Send a message to the server. 
   await WebSock_SendMessage(webSock, "Hello, world!"); 
} catch (Exception ex) { 
   //Add code here to handle any exceptions 
} 

//The MessageReceived event handler. 
private void WebSock_MessageReceived(MessageWebSocket sender, 
   MessageWebSocketMessageReceivedEventArgs args){ 

   DataReader messageReader = args.GetDataReader(); 
   messageReader.UnicodeEncoding = UnicodeEncoding.Utf8; 
   string messageString = messageReader.ReadString(
      messageReader.UnconsumedBufferLength);  
   //Add code here to do something with the string that is received. 
}

//Create an HTTP client object 
Windows.Web.Http.HttpClient httpClient = new Windows.Web.Http.HttpClient(); 
 
//Add a user-agent header to the GET request.  
var headers = httpClient.DefaultRequestHeaders;

//The safe way to add a header value is to use the TryParseAdd method 
   and verify the return value is true, 
    
//especially if the header value is coming from user input. 
string header = "ie"; 

if (!headers.UserAgent.TryParseAdd(header)) {
   throw new Exception("Invalid header value: " + header); 
}  

header = "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)";
 
if (!headers.UserAgent.TryParseAdd(header)) {
   throw new Exception("Invalid header value: " + header); 
}  

Uri requestUri = new Uri("http://www.contoso.com"); 
 
//Send the GET request asynchronously and retrieve the response as a string. 
Windows.Web.Http.HttpResponseMessage httpResponse = new
   Windows.Web.Http.HttpResponseMessage(); 
string httpResponseBody = ""; 
 
try {
   //Send the GET request 
   httpResponse = await httpClient.GetAsync(requestUri); 
   httpResponse.EnsureSuccessStatusCode(); 
   httpResponseBody = await httpResponse.Content.ReadAsStringAsync(); 
} catch (Exception ex) {
   httpResponseBody = "Error: " + ex.HResult.ToString("X") + " Message: " + ex.Message; 
}