private static IEnumerable<Students> YoungStudents(Students[] collection, int startAge, int endAge)
{
var sorted = collection.Where(st => st.Age >= startAge && st.Age <= endAge);
return sorted;
}
private static IEnumerable<Students> FirstNameBeforeLast(Students[] collection)
{
var sorted = collection.OrderBy(x => x.FirstName.CompareTo(x.LastName) < 0);
return sorted;
}
