Various errors building latest commit on develop

[Evangelink]

Describe the bug

I did a fresh clone of MahApps.Metro and when trying to compile the solution I have the following issues (they might be related that's why I am opening only one ticket).

Various NU1701:

Warning	NU1701	Package 'Microsoft.Xaml.Behaviors.Wpf 1.0.1' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework '.NETCoreApp,Version=v3.0'. This package may not be fully compatible with your project.

Various NU1605:

Error	NU1605	Detected package downgrade: Fody from 6.0.0 to 5.2.0. Reference the package directly from the project to select a different version. 
 MahApps.Metro.Demo -> Costura.Fody 4.1.0 -> Fody (>= 6.0.0) 
 MahApps.Metro.Demo -> Fody (>= 5.0.0)

It seems that the last commit is correctly building on the CI agent so I am assuming there is some missing resource or misconfigured thing on my machine. I am open to suggestion on what could be wrong.

Thank you!

Environment

• MahApps.Metro commit 87e7bb1
• OS: Win10
• Visual Studio 16.2.2
• .NET Core SDKs installed:
  1.1.14 [C:\Program Files\dotnet\sdk]
  2.1.602 [C:\Program Files\dotnet\sdk]
  2.1.604 [C:\Program Files\dotnet\sdk]
  2.1.700 [C:\Program Files\dotnet\sdk]
  2.1.701 [C:\Program Files\dotnet\sdk]
  2.1.801 [C:\Program Files\dotnet\sdk]
  2.2.202 [C:\Program Files\dotnet\sdk]
  2.2.204 [C:\Program Files\dotnet\sdk]
  2.2.300 [C:\Program Files\dotnet\sdk]
  2.2.301 [C:\Program Files\dotnet\sdk]
  2.2.401 [C:\Program Files\dotnet\sdk]
  3.0.100-preview6-012264 [C:\Program Files\dotnet\sdk]

[punker76]

@Evangelink is fixed now

[punker76]

@Evangelink The NU1701 warning is ok for now, because this package is still not available for .Net Core 3

[Evangelink]

You rock!