Currently, the QueryableEntityCoreCollectionView<T> class forces you to have an empty/parameterless constructor for the T type. This allows easier creation of the items at runtime. However, in some situations it makes sense to allow classes with only constructors with parameters. Such scenario is when following the DDD (Domain-Driven Design) pattern where it is strongly adviced to avoid having empty constructor in your entity classes.

Currently, the RadEntityFrameworkCoreDataSource will work properly only in EF Core 3.1. Otherwise, the following error occurs when using the source with EF Core 5 or 6:
In case you need to use the Telerik EF support, you can use the QueryableEntityCoreCollectionView instead of RadEntityFrameworkCoreDataSource as shown in the MVVM Usage article.