private static StudentsWithAge[] GetStudents(StudentsWithAge[] studentsList)
 {
     var newList =
         from student in studentsList
         where student.Age >= 18 && student.Age <= 24
         select student;
     return newList.ToArray();
 }
 static void Main(string[] args)
 {
     StudentsWithAge[] studentsList = new StudentsWithAge[5];
     studentsList[0] = new StudentsWithAge("Stefan", "Petrov", 22);
     studentsList[1] = new StudentsWithAge("Todor", "Georgiev", 31);
     studentsList[2] = new StudentsWithAge("Angel", "Gospodinov", 15);
     studentsList[3] = new StudentsWithAge("Aleksander", "Dimitrov", 18);
     studentsList[4] = new StudentsWithAge("Peter", "Petrov", 24);
     Console.WriteLine("Original List\n");
     foreach (var student in studentsList)
     {
         Console.WriteLine("{0} {1} {2}", student.FirstName, student.LastName, student.Age);
     }
     StudentsWithAge[] newList = GetStudents(studentsList);
     Console.WriteLine("\nNew List\n");
     foreach (var student in newList)
     {
         Console.WriteLine("{0} {1} {2}", student.FirstName, student.LastName, student.Age);
     }
     Console.WriteLine();
 }
 static void Main(string[] args)
 {
     StudentsWithAge[] studentsList = new StudentsWithAge[5];
     studentsList[0] = new StudentsWithAge("Stefan", "Petrov", 22);
     studentsList[1] = new StudentsWithAge("Todor", "Georgiev", 31);
     studentsList[2] = new StudentsWithAge("Angel", "Gospodinov", 15);
     studentsList[3] = new StudentsWithAge("Aleksander", "Dimitrov", 18);
     studentsList[4] = new StudentsWithAge("Peter", "Petrov", 24);
     Console.WriteLine("Original List\n");
     foreach (var student in studentsList)
     {
         Console.WriteLine("{0} {1} {2}", student.FirstName, student.LastName, student.Age);
     }
     StudentsWithAge[] newList = GetStudents(studentsList);
     Console.WriteLine("\nNew List\n");
     foreach (var student in newList)
     {
         Console.WriteLine("{0} {1} {2}", student.FirstName, student.LastName, student.Age);
     }
     Console.WriteLine();
 }