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VS locks netfx-System.StringResources.dll during build, never lets go


Try this:
  1. Create a project that uses the netfx-System.StringResources NuGet package, among others
  2. Delete the "packages" folder in the solution folder using Windows Explorer
  3. Open the solution's Manage NuGet Packages dialog, and click Restore
  4. Build the solution (succeeds)
  5. Delete the "packages" folder again as in step 2
ERROR: Can't delete netfx-System.StringResources.dll because it is being used by another process

Notice that Windows is able to delete any other packages in the folder just fine. It is only System.StringResources that has the problem.