I want to run a unit test for an ASP.NET application while debugging the application (not the test runner process). I attach the VS 2005 debugger to the aspnet_wp process and select "Run Unit Test" for a particular test method. I get a prompt: "Do you want to stop debugging?" When I click "No" the following error pops up --------------------------- Build error --------------------------- Cannot build project: Operation aborted (Exception from HRESULT: 0x80004004 (E_ABORT)) --------------------------- OK --------------------------- This should not be an error and ideally I would not want to receive the prompt at all unless the project is out of date and needs to be built. In this case it was up to date.