using System.Reactive.Disposables; namespace System.Reactive.Linq.ObservableImpl { internal sealed class EmptyDirect<TResult> : BasicProducer<TResult> { internal static readonly IObservable<TResult> Instance = new EmptyDirect<TResult>(); private EmptyDirect() { } protected override IDisposable Run(IObserver<TResult> observer) { observer.OnCompleted(); return Disposable.Empty; } } }