C# Close network session on server

I have a local computer that connect to a Windows Server and accesses some files on a shared folder on that server. The server has several users defined, with rights to access some folder and to block some other, depending on the user connected. What I need is a C# code to FULLY disconnect from the server, so that I have to enter the credentials again if I want to reconnect. The code has to detect, NOT ONLY the open files or folders opened, but ANY connection, From my point of view, as far as I have introduced some credentials (user + pwd) I AM connected, and that connection can be detected and canceled. I want a C# code that will allow me, while I sit in front of my local computer, to connect to server with credentials for User1, then disconnect, then reconnect as User2, etc, with any user defined on the server, WITHOUT THE NEED to close my local session.