C# program to implement multi level inheritance.

using System;
namespace Inherit
{
class Shape
{
public Shape()
{
Console.WriteLine("Constructor of base class Shape");
}
}
class Polygon : Shape
{
public Polygon()
{
Console.WriteLine("Constructor of Base class Polygon");
}
}
class Quad : Polygon
{
public Quad()
{
Console.WriteLine("Contructor of class Quad");
}
public static void Main(string[] args)
{
Quad obj= new Quad();
}
}
}