Pausing all threads in current process at run time

You can use this to quickly indentify the threads of your process:

using System.Diagnostics;ProcessThreadCollection threads = Process.GetCurrentProcess().Threads;

Then you can use kernel32.dll with P/Invoke to do whatever you need with those threads. Use OpenThread to get a handle to the desired thread and then suspend it with SuspendThread using that handle.

Here are the P/Invoke declaration for the two methods:

[DllImport("kernel32.dll")]static extern IntPtr OpenThread(uint dwDesiredAccess, bool bInheritHandle, uint dwThreadId);[DllImport("kernel32.dll")]static extern uint SuspendThread(IntPtr hThread);

I assume you're not going to pause all the threads in the application, otherwise there will be nothing running to un-suspend them. Or have I missed something?

A suggestion: Try giving names to all the threads you create. Any threads without a name, or that don't match your naming convention, must have been create by a third-party component. This might get you to the root cause quicker without having to pause lots of threads.

From my pov this sounds not right.

• Which kind of tests are you writing? If you are speaking about unit tests, then this is not a Unit test case - sounds more like integration test
• Consider to isolate the API calls in a class and then use dependendcy injection so that you can test without the 3rd party library with mocks/stubs and can also provoke/test an exception raised from the 3rd party library