Is it possible to break all threads but one in Visual Studio 2010?

Is it possible to break all threads but one in Visual Studio 2010 Ultimate?

One of the threads in my application is running a TCP proxy. The server that it connects to disconnects when the client (that connects to my proxy) doesn't send a keep-alive packet every few seconds.

So I would need to break all other threads (like packet processing) so that I can edit that part without getting disconnected.