How to call base abstract class virtual method ?

Question

namespace ExcelCopy

{

public class Program : Abs

{

static void Main(string[] args)

{

Program p = new Program();

p.NonAbstract();

Abs a = new Program();

a.NonAbstract();

}

public override void GetFullName()

{

throw new NotImplementedException();

}

public override void NonAbstract()

{

Console.WriteLine("I am method five from child class, I have my own implimentation");

}

}

public abstract class Abs

{

public abstract void GetFullName();

public virtual void NonAbstract()

{

Console.WriteLine("Hi i ma non abstract method from abstract class");

}

}

}