namespace System.Reactive.Linq.ObservableImpl { internal sealed class Dematerialize<TSource> : Producer<TSource, Dematerialize<TSource>._> { internal sealed class _ : Sink<Notification<TSource>, TSource> { public _(IObserver<TSource> observer) : base(observer) { } public override void OnNext(Notification<TSource> value) { switch (value.Kind) { case NotificationKind.OnNext: ForwardOnNext(value.Value); break; case NotificationKind.OnError: ForwardOnError(value.Exception); break; case NotificationKind.OnCompleted: ForwardOnCompleted(); break; } } } private readonly IObservable<Notification<TSource>> _source; public Dematerialize(IObservable<Notification<TSource>> source) { _source = source; } protected override _ CreateSink(IObserver<TSource> observer) { return new _(observer); } protected override void Run(_ sink) { sink.Run(_source); } } }