using Windows.Networking;
using Windows.Networking.Sockets;// Define some variables and set valuesStreamSocket clientSocket = new StreamSocket();HostName serverHost = new HostName("www.contoso.com");string serverServiceName = "https";// For simplicity, the sample omits implementation of the// NotifyUser method used to display status and error messages // Try to connect to contoso using HTTPS (port 443)try {// Call ConnectAsync method with SSLawait clientSocket.ConnectAsync(serverHost, serverServiceName, SocketProtectionLevel.Ssl);NotifyUser("Connected");}catch (Exception exception) {// If this is an unknown status it means that the error is fatal and retry will likely fail.if (SocketError.GetStatus(exception.HResult) == SocketErrorStatus.Unknown) {throw;}NotifyUser("Connect failed with error: " + exception.Message);// Could retry the connection, but for this simple example// just close the socket.clientSocket.Dispose();clientSocket = null; }// Add code to send and receive data using the clientSocket// and then close the clientSocket

using Windows.Networking;
using Windows.Networking.Sockets;
using Windows.Storage.Streams;// Define some variables and set valuesStreamSocket clientSocket = new StreamSocket();HostName serverHost = new HostName("www.contoso.com");string serverServiceName = "http";// For simplicity, the sample omits implementation of the// NotifyUser method used to display status and error messages // Try to connect to contoso using HTTP (port 80)try {// Call ConnectAsync method with a plain socketawait clientSocket.ConnectAsync(serverHost, serverServiceName, SocketProtectionLevel.PlainSocket);NotifyUser("Connected");}catch (Exception exception) {// If this is an unknown status it means that the error is fatal and retry will likely fail.if (SocketError.GetStatus(exception.HResult) == SocketErrorStatus.Unknown) {throw;}NotifyUser("Connect failed with error: " + exception.Message, NotifyType.ErrorMessage);// Could retry the connection, but for this simple example// just close the socket.clientSocket.Dispose();clientSocket = null; return;}// Now try to sent some dataDataWriter writer = new DataWriter(clientSocket.OutputStream);string hello = "Hello World ☺ ";Int32 len = (int) writer.MeasureString(hello); // Gets the UTF-8 string length.writer.WriteInt32(len);writer.WriteString(hello);NotifyUser("Client: sending hello");try {// Call StoreAsync method to store the hello messageawait writer.StoreAsync();NotifyUser("Client: sent data");writer.DetachStream(); // Detach stream, if not, DataWriter destructor will close it.}catch (Exception exception) {NotifyUser("Store failed with error: " + exception.Message);// Could retry the store, but for this simple example// just close the socket.clientSocket.Dispose();clientSocket = null; return;}// Now upgrade the client to use SSLtry {// Try to upgrade to SSLawait clientSocket.UpgradeToSslAsync(SocketProtectionLevel.Ssl, serverHost);NotifyUser("Client: upgrade to SSL completed");// Add code to send and receive data // The close clientSocket when done}catch (Exception exception) {// If this is an unknown status it means that the error is fatal and retry will likely fail.if (SocketError.GetStatus(exception.HResult) == SocketErrorStatus.Unknown) {throw;}NotifyUser("Upgrade to SSL failed with error: " + exception.Message);clientSocket.Dispose();clientSocket = null; return;}