I wanted to change a load test so that it works similar to what Gabriel Szlechtman described in his blog. Additionally, I followed MSDN instruction on how to create a Load Test Plug-In.

So I created a new project with a plug-in class, added a reference to it from load test project and wanted to hook the plug-in with the test. However, when I was doing the last step I was getting the following error:

Solution

The fix is quite simple. When I added a new class for the plug-in, it was defined without the access modifier (and therefore it was internal), which made the class accessible from other classes only in the same assembly. Adding public access modifier for the plug-in class solved the problem.