CombineLatest<T1, T2, T3, T4, TResult> sealed class CombineLatest<T1, T2, T3, T4, TResult> : Producer<TResult, _<T1, T2, T3, T4, TResult>> Documentation Code public CombineLatest(IObservable<T1> source1, IObservable<T2> source2, IObservable<T3> source3, IObservable<T4> source4, Func<T1, T2, T3, T4, TResult> resultSelector)