namespace System.Reactive { internal sealed class EventPatternSource<TEventArgs> : EventPatternSourceBase<object, TEventArgs>, IEventPatternSource<TEventArgs> { event EventHandler<TEventArgs> IEventPatternSource<TEventArgs>.OnNext { add { Add(value, delegate(object o, TEventArgs e) { value(o, e); }); } remove { Remove(value); } } public EventPatternSource(IObservable<EventPattern<object, TEventArgs>> source, Action<Action<object, TEventArgs>, EventPattern<object, TEventArgs>> invokeHandler) : base(source, invokeHandler) { } } }