Method Overriding

If at all a parent classes method is re-implemented under a child class exactly with the same signature we call it as Method  Overriding.

How to override a parent classes method under child class ?

• If we want to override any parent classes method under child class first under the parent the method must be defined using virtual modifier. Declaring a method as virtual under a class is giving a permission for its child classes to override.
• The methods that are declared as virtual can be overwritten as child classes using a override modifier.

      class1

      public virtual void Show()  // overridable

      class 2:class1

      public override void Show() // overriding

Add a class LoadParent.cs and write the following code

using System;
namespace CSharpConsole
{
    class LoadParent
    {
        public void Test()
        {
            Console.WriteLine("Parent's test method");
        }
        public virtual void  Show() //  overridable
        {
            Console.WriteLine("Parent's show method");
        }
        public void Display()
        {
            Console.WriteLine("Parent's display method");
        }
    }
}
// Add a class loadchild.cs and write the following code
using System;
namespace CSharpConsole
{
    class loadchild: LoadParent
    {
       // overloading parent's test method
        public void Test(int x)
        {
            Console.WriteLine("Child's test method ");
        }
       public override  void Show()
        {
            Console.WriteLine("Child's show method ");
        }
       public new void Display()
       {
            Console.WriteLine("Child's display method");
       }
       static void Main()
       {
           loadchild c = new loadchild();
           c.Test();
           c.Test(10);
           c.Show();
           c.Display();
           Console.ReadLine();
       }
   }
}