Starting from today, a WPF project that belongs to a solution with 20 projects, set all my references to missing
I\'ve just checked the MS suggestion and the othe
I had similar issue. The solution, which worked for me was to pop the nuget package manager for the solution and refresh the packages.
Another case involved missing packages and nuget package manager for the solution showed updates and dependencies, which needed to be installed and this was the fix.
Another case was exactly as pointed above - delete packages folder fixed it.
Editing manually the project is an option, but there is a chance if you poke where you are not supposed to, your project may not open. If you can, avoid doing that is my opinion.