Based on codeplex discussion https://wpftoolkit.codeplex.com/discussions/653034.
User wants to be able to use a Collection <T> as a PropertyItem in the PropertyGrid and when expanding this PropertyItem, see the Collection children, the T items.
Currently, expanding a Collection<T> will show the Collection properties, which is its Count.
Comments: ** Comment from web user: BoucherS **
User wants to be able to use a Collection <T> as a PropertyItem in the PropertyGrid and when expanding this PropertyItem, see the Collection children, the T items.
Currently, expanding a Collection<T> will show the Collection properties, which is its Count.
Comments: ** Comment from web user: BoucherS **
This will be fixed in v3.1 Plus.
The new property PropertyGrid.IsExpandingNonPrimitiveTypes will be available to expand non-primitive types properties. This means the Collections<T>, List<T> or any UserObject will be expandable and the sub-properties or sub-items will be editable directly from the PropertyGrid.