New Post: PropertyDescriptor doesn't work for PropertyGrid in community edition?

Hi,

You are right.
The CustomPropertyItem's constructor is not public in the OpenSource version. The Toolkit "Plus" makes it available. Here are the PropertyGrid features that are added in the "Plus" version of the toolkit:
-Custom Properties (define new PropertyItems)
-DefinitionKey Attribute (Properties are linked with a key)
-ExpandedCategoryAttribute (some Categories can start expanded/collapsed)
-ExpandedObjectAttribute with parameter = True/False (some properties can start expanded/collapsed)
-Localization

 -ExtendedDisplayName Attribute
 -LocalizedCategory Attribute
 -LocalizedDescription Attribute
 -LocalizedDisplayName Attribute

-Editor Définitions (modify the PropertyGrid's editors)
-Multi-Selected Objects (you can set PropertyGrid.SelectedObjects)
-Custom Properties List (you can set PropertyGrid.PropertiesSource to a list of generic objects)

You can have a look at the site : http://wpftoolkit.com/