using System;

​

public abstract class Product

{

}

​

public class SimpleProduct: Product

{

}

​

​

public class SimpleProduct2: Product

{

}

​

​

​

public class Factory

{

    public T CreateProduct<T>() where T: Product, new()

    {

        return new T();

    }

}

​

public class Program

{

    public static void Main()

    {

        var factory = new Factory();

        var p = factory.CreateProduct<SimpleProduct>();

        Console.WriteLine(p);

        var p2 = factory.CreateProduct<SimpleProduct2>();

        Console.WriteLine(p2);

    }

}