namespace System.Reactive.Linq.ObservableImpl { internal sealed class IgnoreElements<TSource> : Producer<TSource, IgnoreElements<TSource>._> { internal sealed class _ : IdentitySink<TSource> { public _(IObserver<TSource> observer) : base(observer) { } public override void OnNext(TSource value) { } } private readonly IObservable<TSource> _source; public IgnoreElements(IObservable<TSource> source) { _source = source; } protected override _ CreateSink(IObserver<TSource> observer) { return new _(observer); } protected override void Run(_ sink) { sink.Run(_source); } } }