using System;

public class Program

{

    delegate bool IsTeenAger(Student stud);

    public static void Main()

    {

        IsTeenAger isTeenAger = delegate(Student s) { return s.Age > 12 && s.Age < 20; };

        Student stud = new Student() { Age = 25 };

        Console.WriteLine(isTeenAger(stud));

    }

}

​

public class Student{

​

    public int Id { get; set; }

    public string Name { get; set; }

    public int Age { get; set; }

}