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

System.Reactive.Joins.Pattern<TSource1, TSource2, TSource3, TSource4, TSource5, TSource6, TSource7>

public class Pattern<TSource1, TSource2, TSource3, TSource4, TSource5, TSource6, TSource7> : Pattern
namespace System.Reactive.Joins { public class QueryablePlan<[Nullable(2)] TResult> { public Expression Expression { get; } } }