The sample applications compile and run in both .NET Framework and .NET Core.
Below are some screenshots from many of our GoXam samples.
The GoXam kit includes the full C# and XAML source to 47 sample applications. Many of these samples show how to build classic diagram types like Entity Relationship diagrams, State Charts, OrgCharts, class hierarchy trees and planograms. Many others show off specific features like layout and using XAML to define nodes.
You can use these samples as the starting point for your application.