QueryablePattern<TSource1, TSource2, TSource3> public class QueryablePattern<TSource1, TSource2, TSource3> : QueryablePattern Documentation Code public QueryablePattern<TSource1, TSource2, TSource3, TSource4> And<TSource4>(IObservable<TSource4> other) public QueryablePlan<TResult> Then<TResult>(Expression<Func<TSource1, TSource2, TSource3, TResult>> selector)