namespace System.Reactive.Joins { public class QueryablePattern<[System.Runtime.CompilerServices.Nullable(2)] TSource1, [System.Runtime.CompilerServices.Nullable(2)] TSource2, [System.Runtime.CompilerServices.Nullable(2)] TSource3> : QueryablePattern { public QueryablePattern<TSource1, TSource2, TSource3, TSource4> And<[System.Runtime.CompilerServices.Nullable(2)] TSource4>(IObservable<TSource4> other); public QueryablePlan<TResult> Then<[System.Runtime.CompilerServices.Nullable(2)] TResult>(Expression<Func<TSource1, TSource2, TSource3, TResult>> selector); } }