why we use override in c#.net ? for selenium

Anjali Khan

Hi frnds

i know about the Overrideing .

but wants to know that why we use overrideing in c# . for selenium with automation testing .

interviewer asked to me why you used run time polymorphism and where you used in your project

3 Replies

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Nanddeep Nachan8y ago
Accepted answer
Overriding is an example of dynamic (runtime) polymorphism, because compiler doesn't necessarily know what type of object is being passed in at compile-time.

Lets take below example
public static class MessagePrinter
{
    public static void PrintMessage(IMessage message)
    {
        Console.WriteLine(message.GetMessage());
    }
}

public interface IMessage
{
    public string GetMessage();
}

public class XMLMessage : IMessage
{
    public string GetMessage()
    {
        return "This is an XML Message";
    }
}

public class SOAPMessage : IMessage
{
    public string GetMessage()
    {
        return "This is a SOAP Message";
    }
}
At runtime you can pass any class implementing IMessage. This will allow you to test any functionality independently.
Nanddeep Nachan8y ago
With virtual and overriding, you will be able to give new definition to method in child class. However if you pass interface to your method, you will be able to pass in any object implementing that interface.
Anjali Khan8y ago
Thanks nandeep But we used virtual n override keyword on base n drive class also.its nacessary