using System;

namespace ConstructorTest

{

    public class Program

    {

        public static void Main(string[] args)

        {

            var tester = new C();

            //Console.ReadKey();

        }

    }

    public class A

    {

        public A(string input)

        {

            Console.WriteLine("From A " + input);

        }

    }

    public class B : A

    {

        public B(string input)

            : base("From B")

        {

            Console.WriteLine("From B " + input);

        }

    }

    public class C : B

    {

        public C()

            : base("From C")

        {

            Console.WriteLine("From C");

        }

    }

}