using System; using System.Net; using System.Net.Sockets; using System.Text; public class SynchronousSocketClient { public static void StartClient() { // Data buffer for incoming data. byte[] bytes = new byte[1024]; // Connect to a remote device. try { // Establish the remote endpoint for the socket. // This example uses port 11000 on the local computer. IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName()); IPAddress ipAddress = ipHostInfo.AddressList[0]; IPEndPoint remoteEP = new IPEndPoint(ipAddress,11000); // Create a TCP/IP socket. Socket sender = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp ); // Connect the socket to the remote endpoint. Catch any errors. try { sender.Connect(remoteEP); Console.WriteLine("Socket connected to {0}", sender.RemoteEndPoint.ToString()); // Encode the data string into a byte array. byte[] msg = Encoding.ASCII.GetBytes("This is a test<EOF>"); // Send the data through the socket. int bytesSent = sender.Send(msg); // Receive the response from the remote device. int bytesRec = sender.Receive(bytes); Console.WriteLine("Echoed test = {0}", Encoding.ASCII.GetString(bytes,0,bytesRec)); // Release the socket. sender.Shutdown(SocketShutdown.Both); sender.Close(); } catch (ArgumentNullException ane) { Console.WriteLine("ArgumentNullException : {0}",ane.ToString()); } catch (SocketException se) { Console.WriteLine("SocketException : {0}",se.ToString()); } catch (Exception e) { Console.WriteLine("Unexpected exception : {0}", e.ToString()); } } catch (Exception e) { Console.WriteLine( e.ToString()); } } public static int Main(String[] args) { StartClient(); return 0; } }