public class ConcurrentHashSet<T> : IEnumerable<T>, 
	IEnumerable

Public Class ConcurrentHashSet(Of T)
	Implements IEnumerable(Of T), IEnumerable

generic<typename T>
public ref class ConcurrentHashSet : IEnumerable<T>, 
	IEnumerable

type ConcurrentHashSet<'T> =  
    class
        interface IEnumerable<'T>
        interface IEnumerable
    end