static void Main()
{
//create a new Student array & fill it with students
var studentsArr = new Student[10];
studentsArr[0] = new Student("Peter", "Petrov", 19);
studentsArr[1] = new Student("Asen", "Ivanov", 18);
studentsArr[2] = new Student("Vladislav", "Ivanov", 30);
studentsArr[3] = new Student("Apostol", "Bakalov", 21);
studentsArr[4] = new Student("Ilina", "Konsulova", 16);
studentsArr[5] = new Student("Valentina", "Zheliazkova", 24);
studentsArr[6] = new Student("Stoyan", "Ganchev", 25);
studentsArr[7] = new Student("Stoyan", "Stoyanov", 26);
studentsArr[8] = new Student("Dimitrina", "Gospodinova", 27);
studentsArr[9] = new Student("Antonia", "Atanasova", 21);
Console.WriteLine("Initial Array:\r\n");
Console.WriteLine(studentsArr.PrintStudentsArray());
//with lambda expressions
var sortStudentsLambda = studentsArr
.OrderBy(x => x.FirstName)
.ThenBy(x => x.LastName)
.Reverse()
.ToArray();
//with LINQ
var sortStudentsLinq = (from student in studentsArr
orderby student.FirstName, student.LastName
select student)
.Reverse()
.ToArray();
Console.WriteLine("All students sorted by first name & last name in descending order\r\n");
Console.WriteLine(sortStudentsLambda.PrintStudentsArray());
Console.WriteLine(sortStudentsLinq.PrintStudentsArray());
}