Notification from the dll to the winform application

Question

I have created a C# project , and using it's dll as a reference in another Winform application and calling the functions present in the dll project.

I have a requirement that , I have to call a winform's function from that dll. Is there any way I can register a function to my dll ? Or any other way I am able to notify the winform application from the dll , in some condition ?

I just want to send a kind of notification from the dll to the winform application .

I will be using WCF to wrap-up the dll project .(any help ?)

Ideas/Code samples will be much helpful.

Answer 1

The mechanism used by c# for this purpose is called an event .

You will define this event inside your dll project. Your Winforms project will register to this event, and it will run a method each time the event is fired from the dll.