Can C# register a Javascript callback?

I have a Javascript component (JavascriptComponent.js for demonstrative sake) file (which I have to use) in my /Plugins folder so my C# files can recognize it. My C# script (in regular /Assets folder) can get the javascript component with GetComponent<JavascriptComponent>() and access all the variables in the JavascriptComponent just fine. What i want to do in create a callback in the Javascript to another c# script. http://unity3d.com/learn/tutorials/modules/intermediate/scripting/delegates shows how to do create a callback in Javascript. But this doesn't appear to work when I set the function as a C# method. This is how I am doing it.
JavascriptComponent.js:

Code (csharp):

1.  
2. ...
3. var coolIntBro = 1;
4. var MyCoolCallback : Function;
5. ...
6. // later some event will trigger this
7. MyCoolCallback(1234);
8.  

ACScomponent.cs:

Code (csharp):

1.  
2. ...
3. // add C# component
4. OtherCSComponent myOtherCSComponent = randomGameObject.AddComponent<OtherCSComponent>();
5.  
6. // get the Javascript component we are interested in
7. JavascriptComponent javascriptComponent = someGameObject.GetComponent<JavascriptComponent>() as JavascriptComponent;
8.  
9. // set a var in the javascript component - this works fine
10. javascriptComponent.coolIntBro = 2;
11.  
12. // try to set callback - does not work
13. javascriptComponent.MyCoolCallback = myOtherCSComponent .CSCallback;
14. ...
15.  

OtherCSComponent.cs

Code (csharp):

1.  
2. public void CSCallback( int someInt)
3. {...}
4.  

The error i get is this: error CS0428: Cannot convert method group `CSCallback' to non-delegate type `Boo.Lang.ICallable'. Consider using parentheses to invoke the method.

Is there someway to make this work? (I really really really do not want to use SendMessage for JS firing events back into C#).

 

Well, I finally figured it out and wanted to would post this in case someone comes across the problem of getting Javascript to talk to C#. You have to change how you define the callback in Javascript to force it treat it not like an "object" and adding regular ": Function" is not good enough (as demonstrated above).
JavascriptComponent.js

Code (csharp):

1.  
2. var coolIntBro = 1;
3. var MyCoolCallback : function(int); // specify the parameters you are going need, notice lower case "f"
4. ...
5.  

With this you should be able to avoid SendMessage.

 

The correct type for delegates in Unityscript is "function(type params) : returnType". e.g.:

Code (csharp):

1. private var foo : function(int) : Vector3;
2.  
3. function Start () {
4.     foo = SomeFunction;
5.     transform.position = foo(5);
6.     foo = AnotherFunction;
7.     transform.eulerAngles = foo(200);
8. }
9.  
10. function SomeFunction (x : int) : Vector3 {
11.     return Vector3(x, x, x);
12. }
13.  
14. function AnotherFunction (x : int) : Vector3 {
15.     return Vector3(x*2, x/2, x+2);
16. }

That's compatible with C# delegates. In this example, foo can only be assigned functions that take an int and return a Vector3.

--Eric