WinSock is the old API for the COM based model. In .Net there is not WinSock, but there is a System.Net.Sockets. Here is an excerpt from the docs:
The System.Net.Sockets namespace provides a managed implementation of the Windows Sockets (Winsock) interface for developers who need to tightly control access to the network.


>Are you referring to .net WinSock, or some other technologies in .Net?