<PackageReference Include="System.Reactive" Version="4.1.0" />

QueryablePattern<TSource1, TSource2, TSource3, TSource4, TSource5, TSource6, TSource7>

public class QueryablePattern<TSource1, TSource2, TSource3, TSource4, TSource5, TSource6, TSource7> : QueryablePattern
Represents a join pattern over seven observable sequences.
public QueryablePattern<TSource1, TSource2, TSource3, TSource4, TSource5, TSource6, TSource7, TSource8> And<TSource8>(IObservable<TSource8> other)

Creates a pattern that matches when all eight observable sequences have an available element.

public QueryablePlan<TResult> Then<TResult>(Expression<Func<TSource1, TSource2, TSource3, TSource4, TSource5, TSource6, TSource7, TResult>> selector)

Matches when all observable sequences have an available element and projects the elements by invoking the selector function.