//using lambda predicate
public static IEnumerable<Student> SelectByAgeBetween18_24Labda(Student[] arr)
{
var selected = arr.Where(student => student.Age >= 18 && student.Age <= 24);
return selected;
}
//using lambda predicate
public static IEnumerable<Student> SelectFirstBeforeLastNameLambda(Student[] arr)
{
var selected = arr.Where(student => student.FirstName.CompareTo(student.LastName) < 0);
return selected;
}
