Based on codeplex disscusion http://wpftoolkit.codeplex.com/discussions/547539.
The propertyGrid doesn't have an editor for Dictionaries.
Comments: ** Comment from web user: BoucherS **
The propertyGrid doesn't have an editor for Dictionaries.
Comments: ** Comment from web user: BoucherS **
Toolkit v3.0 will include an editor for Dictionary.