Hi, I need to communicate my arduino Ethernet shield with pc using visual c#. I don't have idea to do that. Please help me :)
I don’t have idea to do that.
That is not something that you would normally do. The Ethernet shield communicates with the httpd daemon running on a server.
You could develop an application that acts like an httpd daemon, but that is not an easy task.
You could develop an executable, using Visual Studio and C#, that the existing httpd invokes, when the Arduino sends a GET request to the server, specifying your executable. That is not all that difficult.