sriaz

Posted on Thursday, 4 February 2010 09:12

Hi Rob,

There are few problems in your code which are listed below:

public class AbstractClass
The above line say that name of your class is AbstractClass, but it does not say that it is an abstract class. So please change the above line to the following:

public abstract class AbstractClass
Because in this class you wrote an abstract method, and any class which has an abstract method must be in abstract class.

The next problem with your code is:
abstract void Read();
The above line say that you have a function Read which you are going to be over ride in child class, but in .Net every method in class is a private, so you have to make this function public like this:

public abstract void Read();

Because you need to override this function in child classes.

Third problem is that you need to OVERRIDE Read in child classes, which means it should contains some body. Just defining the signature is not enough, like you did in your code.



So your overall code will be like this:


public abstract class AbstractClass
{
public abstract void Read();
}

public class A : AbstractClass
{
public override void Read(){}
}

public class B: A
{
public override void Read(){}
}


Sincerely,
Shahid Riaz Bhatti
www.shahidriaz.com
Sr. Software Engineer
Microsoft Certified Professional (MCP)
Microsoft Certified Application Developer (MCAD)
Microsoft Certified .NET Product Specialist (MCNPS)
C# Brainbench Certified Member