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How to configure socket connect timeout in C#

To configure socket connect timeout in C#, you can define a new IAsyncResult object that has a built in method BeginConnect() which takes the IP address, Port as parameters and than call AsyncWaitHandle.WaitOne() to set a timeout. If the Async process reaches the timeout specified then it will return false.

using System;
using System.Net.Sockets;

public class Program
{
	public static void Main()
	{
		string sIP = "127.0.0.1";
		int iPort = 9876;
		
		Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
		IAsyncResult result = socket.BeginConnect(sIP, iPort, null, null);
		bool success = result.AsyncWaitHandle.WaitOne(5000, true);

		if (socket.Connected){
			socket.EndConnect(result);
		}else {
			socket.Close();
			throw new ApplicationException("Failed to connect server.");
		}
	}
}

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