<PackageReference Include="System.Reactive" Version="7.0.0-preview.1" />

System.Reactive.Joins.QueryablePattern<TSource1, TSource2, TSource3, TSource4>

public class QueryablePattern<TSource1, TSource2, TSource3, TSource4> : QueryablePattern
namespace System.Reactive.Joins { public class QueryablePattern<TSource1, TSource2, TSource3, TSource4> : QueryablePattern { public QueryablePattern<TSource1, TSource2, TSource3, TSource4, TSource5> And<[System.Runtime.CompilerServices.Nullable(2)] TSource5>(IObservable<TSource5> other); public QueryablePlan<TResult> Then<[System.Runtime.CompilerServices.Nullable(2)] TResult>(Expression<Func<TSource1, TSource2, TSource3, TSource4, TResult>> selector); } }