Assembly signing failed; output may not be signed


Hello

I kept getting this error in my solution builds.

Assembly signing failed; output may not be signed — Error signing assembly — The process cannot access the file because it is being used by another process.

The solution I found was to go to Tools –> Options –> Projects and Solutions –> Build and Run and assign the parallel project build number to 1.

This will make your builds slower since it will only compile 1 project at a time, but I have seen this type of issue go away once I backed down on the parallel compiling.

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