NuGet add reference error while installing packages
Solution 1:
I had this problem too, the fix that worked for me was:
- Delete all the folders inside of the packages folder.
- Update all packages in Nuget Package Manager.
Solution 2:
Suffer the same. In the end it occurs that in
Tools -> Options -> Nuget Package Manager -> Package Sources
nuget.org was unchecked. Checking it solve the problem.