Unable to copy file reference.dll to bin/reference.dll. The process cannot access the file reference.dll because it is being used by another process

Question

For one of my ASP.NET 3.5 applications, every single time I try to build the web app, it throws the following build errors in Visual Studio 2008:

Error 16

Answer 1

There was a specific bug in Visual Studio 2008 which was fixed in SP1 which may be your issue. It occurs when you reference an embedded JavaScript file and causes the problem you are seeing. See here for more details.