namespace System.Reactive.Linq.ObservableImpl { internal sealed class Materialize<TSource> : Producer<Notification<TSource>, Materialize<TSource>._> { internal sealed class _ : Sink<TSource, Notification<TSource>> { public _(IObserver<Notification<TSource>> observer) : base(observer) { } public override void OnNext(TSource value) { ForwardOnNext(Notification.CreateOnNext<TSource>(value)); } public override void OnError(Exception error) { ForwardOnNext(Notification.CreateOnError<TSource>(error)); ForwardOnCompleted(); } public override void OnCompleted() { ForwardOnNext(Notification.CreateOnCompleted<TSource>()); ForwardOnCompleted(); } } private readonly IObservable<TSource> _source; public Materialize(IObservable<TSource> source) { _source = source; } public IObservable<TSource> Dematerialize() { return Observable.AsObservable<TSource>(_source); } protected override _ CreateSink(IObserver<Notification<TSource>> observer) { return new _(observer); } protected override void Run(_ sink) { sink.Run(_source); } } }