How do I implement the Signals (from Django) concept in C# -

i'm trying implement signals django (http://docs.djangoproject.com/en/dev/topics/signals/), or concept in c# reduce/eliminate coupling/method dependencies.

so far, i'm replicating code fine, until point whereby realised methods ain't objects in c# in python. thought of pointers, , realised can't have pointers methods. c# version of delegates.

then realised delegates have unique signature it, can't mix delegated methods (with diff signatures) list, or can i?

i did bit more googling, , found reactive linq, far, linq looks awesome, still don't when use them.

so question is, how implement signals concept in c#? thanks!

oh did mention i'm new (1 day old) c#? have background of various other languages incl java/c/python.

cheers :)

what talking here typically handled events in c#, example;

public class sometype {     public event eventhandler someevent;     protected virtual void onsomeevent() {         eventhandler handler = someevent;         if(handler!=null) handler(this,eventargs.empty);     }     public void somethinginteresting() {         // blah         onsomeevent(); // notify subscribers         // blap     }     // ... } 

with subscribers...

sometype obj = new sometype(); //... obj.someevent += /* handler */ //... 

the handler method, in discussion of signatures etc, common way of re-using existing methods non-matching signatures anonymous methods:

obj.someevent += delegate { this.text = "done!"; }; 

you can have list of delegates:

list<somedelegatetype> list = new list<somedelegatetype>(); list.add(...); 

but might redundant because delegate instances multicast - can more directly:

action action = null; action += delegate { console.writeline("did a");}; action += delegate { console.writeline("did b");}; action(); // both & b 

note more complex delegate usage might involv incoming argument values - example:

int = 24; func<int,int,int> func = (x,y) => (x * i) + y; int result = func(2, 3); // 51 

by combining things anonymous methods (or lambdas, above) captured variables, issue of signatures having match issue - can wrap lambda make signature match (adding values or dropping arguments, required).

note events (in particular) common approach keep signature:

void somedelegatetype(object sender, someargstype args); 

where someargstype : eventargs - or use eventhandler<t> you.