Hi,
You can try the LiveExplorer App available here https://wpftoolkit.codeplex.com/ to test the controls from the Toolkit. You will also find the documentation of each control here : https://wpftoolkit.codeplex.com/documentation.
The PropertyGrid have default editors. ComboBoxes will be used for properties of type enum. CheckBoxes will be used for properties of type bool. When using a PropertyGrid, you can use the editor you want for specific properties by using PropertyGrid.EditorDefinitions.
You can select many items in a comboBox if you use the control : CheckComboBox. It could be used as an editor for a specific property in the propertyGrid.EditorDefinitions.
You can try the LiveExplorer App available here https://wpftoolkit.codeplex.com/ to test the controls from the Toolkit. You will also find the documentation of each control here : https://wpftoolkit.codeplex.com/documentation.
The PropertyGrid have default editors. ComboBoxes will be used for properties of type enum. CheckBoxes will be used for properties of type bool. When using a PropertyGrid, you can use the editor you want for specific properties by using PropertyGrid.EditorDefinitions.
You can select many items in a comboBox if you use the control : CheckComboBox. It could be used as an editor for a specific property in the propertyGrid.EditorDefinitions.