Could not connect to net.tcp://localhost:1234

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Hi
I have a simple chat program in c# with a client and a server
when I start the program it give me warning with this message:

Additional information: Could not connect to net.tcp://localhost:1234/Chat/ChatService. The connection attempt lasted for a time span of 00:00:02.0986369. TCP error code 10061: No connection could be made because the target machine actively refused it 127.0.0.1:1234.

what's wrong?
help me
thanks :)

this is a code:

C#

public void Start(ReceiveClient rc,string name)
        {
            inst = new InstanceContext(rc);
            chatClient = new ChatService.SendChatServiceClient(inst);
            chatClient.Start(name);
        }

Posted 15-Oct-15 8:06am

amir.nazarizadeh

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Patrice T · Answer 1 · 2015-10-15T08:18:00

Quote:
what's wrong?

The error message tells you What is the problem

Quote:
Could not connect to net.tcp://localhost:1234/Chat/ChatService.

and why

Quote:
No connection could be made because the target machine actively refused it 127.0.0.1:1234.

Do you have a firewall ?
Have you allowed your program to communicate with outside via a tcp/ip port ? Particularly, is it allowed to listen a port ?
What is your OS ?