ParentChildMethodOverLoading.cs

using System;

public class ParentClass
{
    public ParentClass() //parameterless constructor, this will be overloaded if the ParentClass constructor is called with a string argument
    {
        Console.WriteLine("ParentClass Constructor called");
    }

    public ParentClass(string Message) //method overloads parameterless ParentClass constructor if ParentClass constructor is called with a string argument
    {
        Console.WriteLine(Message);
    }

    public class ChildClass : ParentClass
    {
        public ChildClass() : base("Derived class controlling the Parent Class") //this will overload the ParentClass default constructor
        {
            Console.WriteLine("ChildClass Constructor called");
        }
    }
}


public class Program
{
    public static void Main()
    {
        var CC = new ParentClass.ChildClass();
        Console.ReadKey();
    }

}