A customized version of C#'s Aggregate() method, tailored for paged web API results

AggregateUntil.cs

public static TAccumulate AggregateUntil<TSource, TAccumulate>(this IEnumerable<TSource> source, 
    TAccumulate seed, Func<TAccumulate, TSource, TAccumulate> func, Func<TAccumulate,bool> untilFunc) 
{
    if (source == null)
    {
	throw new ArgumentNullException(nameof(source));
    }

    if (func == null)
    {
	throw new ArgumentNullException(nameof(func));
    }
    TAccumulate result = seed;
    foreach (TSource element in source)
    {
	result = func(result, element);
	if (untilFunc(result))
	{
	    break;
	}
    }
    return result;
}