ReferenceEqualityComparerT - класс

public sealed class ReferenceEqualityComparer<T> : IEqualityComparer<T>
where T : class

Public NotInheritable Class ReferenceEqualityComparer(Of T As Class)
	Implements IEqualityComparer(Of T)

generic<typename T>
where T : ref class
public ref class ReferenceEqualityComparer sealed : IEqualityComparer<T>

[<SealedAttribute>]
type ReferenceEqualityComparer<'T when 'T : not struct> =  
    class
        interface IEqualityComparer<'T>
    end