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

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

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