//Method Overriding:-same name / same signature 
class a
{
	public virtual void display()
	{
		System.Console.WriteLine("Method Overriding Using C#:A Class ");
	}
}
class b : a //b is child of a
{
	public override void display()
	{
		System.Console.WriteLine("Method Overriding Using C#:B Class ");
	}
}
class d : b //d is child of b
{
	public override  void display()
	{
		System.Console.WriteLine("Method Overriding Using C#:D Class ");
	}
}

class c 
{
	public static void Main()
	{
		d x=new d();//Normally object of child
		x.display();
	}
}