System.Object
System.Collections.ObjectModel.Collection<T>
C1.Web.Wijmo.Extenders.Base.Collections.C1ObservableItemCollection<TOwner,TItem>
C1.Web.Wijmo.Extenders.C1Grid.C1BaseFieldCollection
System.EventArgs
C1.Web.Wijmo.Extenders.Base.Collections.C1ObservableItemCollection`2.CollectionChangedEventArgs<TOwner,TItem>