Overriding and Inheritance in C#

Question

Ok, bear with me guys and girls as I\'m learning. Here\'s my question.

I can\'t figure out why I can\'t override a method from a parent class. Here\'s the code fro

Answer 1

If you want to override a base class method, it needs to be declared as virtual. The overriding method in a derived class has to be explicitly declared as override. This should work:

public class BaseObject
{
    protected virtual String getMood()
    {
        return "Base mood";
    }

    //...
}

public class DerivedObject: BaseObject
{
    protected override String getMood()
    {
        return "Derived mood";
    }
    //...
}

Edit: I just tried it in a c# console application, and it compiles. So the source code you use should differ in some tiny but important piece from what you posted here.

My program.cs is this:

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {    
            // leaving out your implementation to save space...    
        }
    }    

    public class SadObject : MoodyObject
    {
        protected override String getMood()
        {
            return "sad";
        }

        //specialization
        public void cry()
        {
            Console.WriteLine("wah...boohoo");
        }
    }

    public class HappyObject : MoodyObject
    {
        protected override String getMood()
        {
            return "happy";
        }

        public void laugh()
        {
            Console.WriteLine("hehehehehehe.");
        }
    }
}