WCF best method to start use

Question

HI,

 I want to create a WCF Web service which control different client web application...

eg
web application only display the result.

data base connectivity , controlling , inserting , deleting all need to be done In web service
and even all Business logic to be written in web service.  

the web application need to be used to display the data and filling the data.

--
I stuck if modify the web service  , I have to manually refresh the different web applications.

I want to avoid this situation any idea will be help full.