I get this message usually when in a debug/edit/debug cycle after successfully building a C# solution and pressing F5 to debug it.Exception Details: System.IO.FileLoadException: Cannot create/shadow copy 'VariousFileName' when that file already exists. If I wait a few moments before pressing F5 after a build, APS.NET seems to have the time to complete whatever it needs to do. This is running VS2005/ASP.NET on localhost. I can't reproduce it on purpose yet, but it happens about 10 times/hour with my current project.