Cannot build Store Package - error

Question

Unable to remove directory "obj\x86\Release\PackageUploadLayout\". The process cannot access the file 'System.Collections.Immutable.dll' because it is being used by another process.   

I cannot build my Store package! I restarted VS , I restarted the system , I cleaned the solution , no result same issue.The app builds , works fine , I just cannot create the Store package and I am trying to update an app that I already have submitted. Any idea? Thanks in advance.

Answer 1

This worked for me. Go to the project folder and delete the "obj" folder. It might complain about "System.Collections.Immutable.dll", Just close Visual studio and continue the deletion.

Answer 2

Deleting the obj folder, shutting down VS and rebooting did not solve the problem for me. I had to create a new project to finally resolve the problem.