ViewModelCollection<TItemModel, TItemViewModel> - класс

public abstract class ViewModelCollection<TItemModel, TItemViewModel> : IList<TItemViewModel>, 
	ICollection<TItemViewModel>, IEnumerable<TItemViewModel>, IEnumerable, 
	IList, ICollection, IReadOnlyList<TItemViewModel>, IReadOnlyCollection<TItemViewModel>, 
	IViewModelCollection<TItemViewModel>, IViewModel, INotifyPropertyChanged, INotifyCollectionChanged, 
	IWeakEventListener
where TItemModel : class
where TItemViewModel : class, IViewModel

Public MustInherit Class ViewModelCollection(Of TItemModel As Class, TItemViewModel As {Class, IViewModel})
	Implements IList(Of TItemViewModel), ICollection(Of TItemViewModel), 
	IEnumerable(Of TItemViewModel), IEnumerable, IList, ICollection, 
	IReadOnlyList(Of TItemViewModel), IReadOnlyCollection(Of TItemViewModel), 
	IViewModelCollection(Of TItemViewModel), IViewModel, INotifyPropertyChanged, INotifyCollectionChanged, 
	IWeakEventListener

generic<typename TItemModel, typename TItemViewModel>
where TItemModel : ref class
where TItemViewModel : ref class, IViewModel
public ref class ViewModelCollection abstract : IList<TItemViewModel>, 
	ICollection<TItemViewModel>, IEnumerable<TItemViewModel>, IEnumerable, 
	IList, ICollection, IReadOnlyList<TItemViewModel>, IReadOnlyCollection<TItemViewModel>, 
	IViewModelCollection<TItemViewModel>, IViewModel, INotifyPropertyChanged, INotifyCollectionChanged, 
	IWeakEventListener

[<AbstractClassAttribute>]
type ViewModelCollection<'TItemModel, 'TItemViewModel when 'TItemModel : not struct when 'TItemViewModel : not struct and IViewModel> =  
    class
        interface IList<'TItemViewModel>
        interface ICollection<'TItemViewModel>
        interface IEnumerable<'TItemViewModel>
        interface IEnumerable
        interface IList
        interface ICollection
        interface IReadOnlyList<'TItemViewModel>
        interface IReadOnlyCollection<'TItemViewModel>
        interface IViewModelCollection<'TItemViewModel>
        interface IViewModel
        interface INotifyPropertyChanged
        interface INotifyCollectionChanged
        interface IWeakEventListener
    end