Error NU1605 Detected package downgrade

Question

I am experiencing the following NU1605 dependency errors in my netcoreapp2.0 console application:

NU1605  Detected package downgrade: System.Dia         


        

Answer 1

Error NU1605 Detected package downgrade

For the error NU1605:

You can use NU1605 to clear the WarningsAsErrors in your project.

That because netcoreapp2.0 projects have NU1605 by default. Check it from Properties->Build->Treat warning as errors:

Add like following:

      NU1605

Check the blog post here: MSBuild integration of NuGet warnings and errors and Unexpected package version warnings.

For the error NU1603:

The warning occurs because System.Runtime.Handles (>= 4.1.0) does not exist in the feed. Typically this is a package authoring error because the package depends on something that doesn't exist.

You can also use NU1603 to resolve this issue:

      NU1603

Note:You would notice that your project has another warning, notice the yellow triangle insignia on the PackageReference DotSpinners on Reference. That because the package DotSpinners is a .NET Framework project, not compatible with your .NET Core project.

Hope this helps.