'Declaration
Public MustInherit Class C1VirtualDataCollection(Of T As Class) Inherits C1DataCollectionBase(Of T) Implements IDataCollection(Of T), ISupportAsyncLoading(Of T), ISupportEditing, ISupportFiltering, ISupportRefreshing, ISupportSorting
public abstract class C1VirtualDataCollection<T> : C1DataCollectionBase<T>, IDataCollection<T>, ISupportAsyncLoading<T>, ISupportEditing, ISupportFiltering, ISupportRefreshing, ISupportSorting where T: class