using System;

public class Program

{

    public static void Main()

    {

        AbstractionTester.Run();

    }

}

​

public sealed class AbstractionTester

{

    internal static void Run()

    {

        Func<A, bool> func = a =>

        {

            var dyn = (dynamic)a;

            dyn.CallMe();

            return true;

        };

​

        B obj = new B();

        func(obj);

    }

}

​

internal interface ICallMe<T> 

    where T : MyEntity

{

    T CallMe();

}

​

//Just a class which holds data I would like to store about every object I have, for example: CreateDate

public abstract class MyEntity

{ }

​

public abstract class A : MyEntity, ICallMe<A>

{

    //some other fields i would like to store..

​

    // This method here must never be invoked

    public A CallMe()

    {

        //throw new Exception();

        Console.WriteLine("Error");

        return this;

    }

}

​

public class B : A, ICallMe<B>

{

    public new B CallMe()

    {

        Console.WriteLine("B");

        return this;

    }

}

​

public class C : A, ICallMe<C>

{

    public new C CallMe()

    {

        Console.WriteLine("C");

        return this;

    }

}