using System;

​

interface IMyInterface<out T>

{

    T Get();  // Retrieve an object of type T

}

​

class Base

{

    public string Name { get; set; }

}

​

class Derived : Base

{

    public int Age { get; set; }

}

​

class MyClass : IMyInterface<Derived>

{

    private Derived _derived = new Derived { Name = "Mozart", Age = 35 };

​

    public Derived Get()

    {

        return _derived;

    }

}

​

class Program

{

    static void Main(string[] args)

    {

        IMyInterface<Base> obj = new MyClass();

        Base baseObj = obj.Get();

        Console.WriteLine(baseObj.Name);

        // Accessing baseObj.Age is not possible because baseObj is of type Base

    }

}