MVVM Toolkit：https://learn.microsoft.com/en-us/dotnet/communitytoolkit/mvvm/
.NET Standard：https://learn.microsoft.com/en-us/dotnet/standard/net-standard?tabs=net-standard-2-0
Upgrade Assistant：https://learn.microsoft.com/en-us/dotnet/core/porting/upgrade-assistant-winforms-framework
