ajax extenders + json

Hi friends ,

My reqmt is really complicated .. any help would be really really appreciated ..

I'm creating a custom ajax extender by using AJAX control project which creates 3 files namely behaviour.js , extender.cs and designer.cs

I'm declaring some methods in extender.cs which has to called from behaviour.js .

shld this be done with JSON ??

Im coding in c# and my class in extender.cs already inherits ExtenderControlBase .
public class CodesetExtenderCsExtender : ExtenderControlBase

How can i now inherit JsonRpcHandler . Is there any way out ??

Pls help me



Thnks in advance