Multi select combo box

Do you have a multi selection combo box similar to Flags-EnumEditBox? Except instead of specifying an enum value, a list of selected items and a full list could be specified..

e.g

class Properties {

    // ...

    [TypeConverter(typeof(AllSelectableOptionsTypeConverter))] // provides the list of standard values
    [Editor(typeof(...), typeof(PropertyEditor)]
    public ObservableCollection<string> Selected {get; set}

}

 Or is there an easy way to adapt EnumEditBox? Almost feels like a subset of EnumEditBox implementation.