ObservableCollectionLookupTKey, TItem, TCollection - класс

Public MustInherit Class ObservableCollectionLookup(Of TKey, TItem As Class, TCollection As {Class, Object, IObservableCollectionLookup(Of TKey, TItem, TCollection)})
	Inherits ObservableCollection(Of TItem, TCollection)
	Implements IObservableCollectionLookup(Of TKey, TItem, TCollection), 
	IObservableCollection(Of TItem, TCollection), IList(Of TItem), 
	ICollection(Of TItem), IEnumerable(Of TItem), IEnumerable, 
	INotifyCollectionChanged, INotifyPropertyChanged, ICloneable, ILookupContainer(Of TKey, TItem)

generic<typename TKey, typename TItem, typename TCollection>
where TItem : ref class
where TCollection : ref class, Object, IObservableCollectionLookup<TKey, TItem, TCollection>
public ref class ObservableCollectionLookup abstract : public ObservableCollection<TItem, TCollection>, 
	IObservableCollectionLookup<TKey, TItem, TCollection>, IObservableCollection<TItem, TCollection>, 
	IList<TItem>, ICollection<TItem>, IEnumerable<TItem>, IEnumerable, 
	INotifyCollectionChanged, INotifyPropertyChanged, ICloneable, ILookupContainer<TKey, TItem>

[<AbstractClassAttribute>]
type ObservableCollectionLookup<'TKey, 'TItem, 'TCollection when 'TItem : not struct when 'TCollection : not struct and Object and IObservableCollectionLookup<'TKey, 'TItem, 'TCollection>> = 
    class
        inherit ObservableCollection<'TItem, 'TCollection>
        interface IObservableCollectionLookup<'TKey, 'TItem, 'TCollection>
        interface IObservableCollection<'TItem, 'TCollection>
        interface IList<'TItem>
        interface ICollection<'TItem>
        interface IEnumerable<'TItem>
        interface IEnumerable
        interface INotifyCollectionChanged
        interface INotifyPropertyChanged
        interface ICloneable
        interface ILookupContainer<'TKey, 'TItem>
    end