using System;

namespace TestVirtualMethodsInConstructors

{

    public class Base

    {

        public Base()

        {

            Console.WriteLine("Constructor of Base Class.");            

            DoSome();

        }

        public virtual void DoSome()

        {                      

            Console.WriteLine("This is Base Class.");

        }

    }

​

    public class Derived : Base

    {

        public Derived()

        {

            Console.WriteLine("Constructor of Derived Class.");

        }

        public override void DoSome()

        {                      

            Console.WriteLine("This is Derived Class.");

        }

    }

    public class Program

    {

        public static void Main(string[] args)

        {   

            // this is not always expected behaviour. DoSome() of base class wont be executed

            Base objBase = new Derived();// Output ---------> This is Derived Class.

        }

    }

}