Question

How can I programmatically determine if I have access to a server (TCP) with a given IP address and port using C#?

Answer 1

Assuming you mean through a TCP socket:

IPAddress IP; if(IPAddress.TryParse('127.0.0.1',out IP)){     Socket s = new Socket(AddressFamily.InterNetwork,     SocketType.Stream,     ProtocolType.Tcp);      try{            s.Connect(IPs[0], port);     }     catch(Exception ex){         // something went wrong     } } 

For more information: http://msdn.microsoft.com/en-us/library/4xzx2d41.aspx?ppud=4