Detected package downgrade: Microsoft.NETCore.App from 2.1.3 to 2.1.0

Question

I try to update my .net solution from .NET Core 1.1 to .NET Core 2.1. I have several .NET Core and .NET standard projects inside, which reference each other and another NuGe

Answer 1

I had this issue as well. What ultimately fixed it for me was uninstalling the .NET SDK 2.1.3 from the "Programs" control panel. Or I basically had to uninstall any later versions of the related SDK libraries that my project was trying to use.