if an interface inherits another

Question

0.00/5 (No votes)

See more:

frends , i had very basic doubt please clear.

if an interface inherits another interface which contain one method.
compiler not asking to implement second interface why.

or

C#

interface IInterface222
  {
        void GetData();
  }

  public interface IInterface23 : IInterface222
  {

  }

why this is allowing with out implementing.

iam aware that interfaces does not contain the definitions this is only reason behind? a

Posted 16-Dec-13 1:41am

rajacsharp5

Updated 16-Dec-13 1:43am

v2

Add a Solution

Comments

johannesnestler 16-Dec-13 8:17am

you are not implementing the Interface, you just declared an inherited one. implementation is done on a class - and of course compiler will complain if your GetData method isn't there.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Answer 1 · 2013-12-16T01:47:00

Solution 1

Because IInterface222 implementation accomplishes IInterface23 implementation too.

Posted 16-Dec-13 1:47am

CPallini

Comments

rajacsharp5 16-Dec-13 8:01am

your telling ,subclass which inherits IInterface23 and do implementation ?

CPallini 16-Dec-13 8:08am

Yes, if you have
class Foo : IInterface23
and Foo implements GetData()
BTW what an unfortunate name for a void method.

rajacsharp5 26-Dec-13 2:35am

public void GetData(){
Console.Write("some text");
}
You can extend an interface to add new methods or members. In the new interface definition, use the colon operator followed by the name of the original interface. This is very similar to derivation in classes.
The extended interface subsumes the original interface, so any class that implements the extended interface must also implement the original interface as well.