'Declaration <DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Content)> Public ReadOnly Property GroupStyle As ObservableCollection(Of GroupStyle)
'Usage Dim instance As DataValidationListBox Dim value As ObservableCollection(Of GroupStyle) value = instance.GroupStyle
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public ObservableCollection<GroupStyle> GroupStyle {get;}