real time example overriding ?

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can anybody share time example of overriding, without using any dummy classes,

eg.
public class A
{

public int Add()
{
return 10;
}
}

public class B:A
{
public int Add()
{
return 11;
}
}
Main()
{
A obj = new B();

}

in which scenario we need to point object of child class need to bind to base class??

Posted 21-Nov-14 22:55pm

Vivek S Kale

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BillWoodruff 22-Nov-14 5:10am

What do you mean by "real time" ?

Vivek S Kale 22-Nov-14 5:40am

i think you don't know anything about C#

BillWoodruff 22-Nov-14 8:48am

Of course, Dear, But, now that I know that I don't know, I can just ... well ... relax :)

Philippe Mori 22-Nov-14 12:54pm

Obviously, it is you that don't known anything about C#. Here, you are talking about run-time behavioir which is different from real-time.

Real-time is something that is time-dépendent like streaming something from the web. In such case, there are timing constraint on the system to have playback without glitches.

Philippe Mori 22-Nov-14 12:56pm

By the way, you should make the effort to use code formating for the code part.

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OriginalGriff · Answer 1 · 2014-11-21T23:19:00

"without using any dummy classes" eh? OK...

Look at the standard ToString method:
It is implemented by the object class (from which all the other classes are derived) and it returns a string which is the full name of the object.
Most (but not all) derived classes override this to provide a string that is more relevant to the actual instance content: int overrides it to return a string representation of the integer value, bool overrides it to return either "true" or "false", and so on. If you create your own class, you can also override it:

C#

public class MyClass
    {
    public string Name { get; set; }
    public DateTime InsertDate { get; set; }
    public override string ToString()
        {
        return Name + " " + InsertDate.ToShortDateString();
        }
    }

When you call ToString on an instance, the system works out the highest level override and calls that instead of the default object implementation.