UdpClient, Receive() right after Send() does not work?

Question

Consider the following code:

client.Send(data, data.Length, endpoint);
byte[] response = client.Receive(ref endpoint);

While, according to

Answer 1

probably the remote host has firewall then couldn't response to request, before send request set the

client.Client.ReceiveTimeout = 5000; 

so when the response couldn't get the request you have a exception

Answer 2

You probably want to setup two UdpClients: one for listening, one for sending.

For the receiving UdpClient, use the constructor that takes a port.