Where is the Visual Studio 2017 Winforms Designer cache?

Question

I\'m getting some annoying errors from Visual Studio Designer when trying to open one of my forms (Could not load type x from assembly y, even though assembly y clearly cont

Answer 1

To clean windows forms designer project assemblies, you need to delete subforlders of ProjectAssemblies folder which is located in %userprofile%\appdata\local\Microsoft\VisualStudio\ under one of the folders depending to your visual studio version and edition.

For example for me:

%userprofile%\appdata\local\Microsoft\VisualStudio\15.0_a26f780e\ProjectAssemblies

If you look in the folder, you see subfolders containing assemblies of your projects.