using System;

​

class Gen<T>

{

    T ob;

    public Gen(T o) 

        {

            ob = o;

        }

    public T Get()

    {

        return ob;

    }

}

​

class Gen2<T, V> : Gen<T>

{

    V ob2;

    public Gen2(T o, V o2) : base(o) 

        {

            ob2 = o2;

        }

    public V Get2()

    {

        return ob2;

    }

}

​

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Ogranichenie na base class:");

        Gen2<string, int> x = new Gen2<string, int>("val = ", 5);

        Console.WriteLine(x.Get() + x.Get2());

    }

}