The requested operation cannot be performed on a file with a user-mapped section open

Question

Whenever I tried to copy 4 files into my bin folder, after stopping the main service, I am getting an error with one file (TexteDll). The error is:

Cannot co         


        

Answer 1

Close visual studio, delete bin , debug release folder, and start visual studio project again. that fixed my problem

Answer 2

The solution for me was to close out of all instances of VS and to kill any hanging devenv.exe processes.

Answer 3

I encountered this error and it turned out the issue was FxCop was running against my project. I closed FxCop and then I could compile again.

Answer 4

close all documents on VS and try to rebuild again. If it doesn't work restart VS. This problem is related to lock of DLL files.