public void NumberOfSundaysThatFellOnTheFirstOfTheMonthDuringThe20thCentury_Is171()
{
var start = DateTime.Parse("1 Jan 1901");
var end = DateTime.Parse("1 Jan 2001");
var answer = Sequences.GenerateIteratively <DateTime>((date) => date.AddDays(1))
(start)
.Where(MatchesProblemConditions)
.TakeWhile(date => date < end)
.Count();
Assert.AreEqual(171, answer);
}
