Implementing Interfaces correctly

[Matt Morrison]

Hello All,

Can someone please explain to me what the implication might be if I did not implement an interface correctly i.e. if the interface defined an update() method and I wrote a class that implements the interface and all its methods and properties; all except for the update() method?

There is no particular reason for my question, just curious as although I am picking up more design patterns and programming to interfaces I have never understood what might be if we did not 'adhere to the contract'?!

Thanks in advance for your input.

 

[JohnH]

Code won't compile. Just try and you'll see.

 

[Matt Morrison]

Of course, thanks for your input!