public void FirstOrDefaultTestNegative()
 {
     Assert.AreEqual(FirstOrDefault.FirstOrDefaultForLoop(People.PeopleList, "George")?.FirstName, FirstOrDefault.FirstOrDefaultLinq(People.PeopleList, "George")?.FirstName);
 }
 public void FirstOrDefaultTestPositive()
 {
     Assert.AreEqual(FirstOrDefault.FirstOrDefaultForLoop(People.PeopleList, "Dan")?.FirstName, FirstOrDefault.FirstOrDefaultLinq(People.PeopleList, "Dan")?.FirstName);
 }