'Declaration
<DefaultMemberAttribute("Item")> <DebuggerTypeProxyAttribute(System.Collections.Generic.Mscorlib_KeyedCollectionDebugView`2)> <DebuggerDisplayAttribute("Count = {Count}")> Public MustInherit Class C1ObservableKeyedCollection (Of TKey,TItem) Inherits System.Collections.ObjectModel.KeyedCollection(Of TKey,TItem)
[DefaultMember("Item")] [DebuggerTypeProxy(System.Collections.Generic.Mscorlib_KeyedCollectionDebugView`2)] [DebuggerDisplay("Count = {Count}")] public abstract class C1ObservableKeyedCollection<TKey,TItem> : System.Collections.ObjectModel.KeyedCollection<TKey,TItem>