Polymorphism: Late biding or Overriding example

polyOverridding.cs

using System; 

namespace polymorphismExample 
{ 
  public class parentClass 
  {
    public virtual void Display()
    {
      Console.WriteLine("Hello! My name is Yann!");
    }
  } 
  
  public class childClass:parentClass 
  {
    public override void Display()
    {
      Console.WriteLine("Hello! Nice to meet you!");
    }
  } 
  
  public class Program
  {
    static void Main(string[] args) 
    { 
      parentClass obj = new childClass();
      obj.Display()
      Console.ReadKey(); 
    } 
  }
}