错误：无法建立连接，因为目标机器主动拒绝它

Question

i use this code for working with Port

https://docs.microsoft.com/en-us/dotnet/framework/network-programming/asynchronous-client-socket-example

but I get the following error. No connection could be made because the target machine actively refused it.

Should I not connect(bind) the socket to the port?

Answer 1

First we have to check whether the Database service or particular service is started or Dead position by using this command in linux terminal

1. service database status (or) service service-name status

If particular service status is Dead or inactive then we have to start the service by using

2. service service-name start

Then check the connection, it will connect Absolutely

Answer 2

i changd code.

  Socket listener = new Socket(AddressFamily.InterNetwork,
                SocketType.Stream, ProtocolType.Tcp)

                listener.Bind(localEndPoint);
                listener.Listen(200);

worked.But I didn't understand why I had to do this?

There is no such thing in Microsoft's code.