If I open visual studio build and then build again I always get this error.
requested operation cannot be performed on a file with a user-mapped
then I have to restart visual studio and go through it all over again. This just recently started happening any ideas why ?
Machine – Visual Studio 2010, Windows 7
Check out the answer to this question. One possibility is the Visual Studio Achievements extension.
Another possibility here related to having the same 3rd party assembly referenced twice with different hint paths.