<PackageReference Include="System.Reactive" Version="6.1.0" />

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

public class Pattern<TSource1, TSource2, TSource3> : Pattern
Represents a join pattern over three observable sequences.
namespace System.Reactive.Joins { public class Pattern<TSource1, TSource2, TSource3> : Pattern { public Pattern<TSource1, TSource2, TSource3, TSource4> And<TSource4>(IObservable<TSource4> other); public Plan<TResult> Then<TResult>(Func<TSource1, TSource2, TSource3, TResult> selector); } }