public sealed class WeakCollection<T> : ICollection<T>, 
	IEnumerable<T>, IEnumerable, ICollection
where T : class

Public NotInheritable Class WeakCollection(Of T As Class)
	Implements ICollection(Of T), IEnumerable(Of T), 
	IEnumerable, ICollection

generic<typename T>
where T : ref class
public ref class WeakCollection sealed : ICollection<T>, 
	IEnumerable<T>, IEnumerable, ICollection

[<SealedAttribute>]
type WeakCollection<'T when 'T : not struct> =  
    class
        interface ICollection<'T>
        interface IEnumerable<'T>
        interface IEnumerable
        interface ICollection
    end