public Aggregate(AggregateObservable <TSource> parent, IObserver <TSource> observer, IDisposable cancel) :
base(observer, cancel)
{
this.parent = parent;
this.seenValue = false;
}
public Aggregate(AggregateObservable <TSource, TAccumulate> parent, IObserver <TAccumulate> observer, IDisposable cancel) : base(observer, cancel)
{
this.parent = parent;
this.accumulation = parent.seed;
}