Disable ASP.net Rest service in config file

For those who have the same problem,
I had defined my svc file like this:

<![CDATA[<%@ ServiceHost Language="C#" 
    Debug="true" 
    Service="ServiceName" 
    CodeBehind="~/App_Code/ServiceName.cs"
    Factory="System.ServiceModel.Activation.WebServiceHostFactory"
 %>]]>

 
by doing this, It seems IIS (or ...) activates my service even if I don't have any configuration in my web.config! So the I removed the Factory=".." from the svc file. by doing this, I have to define it in the config file otherwise it will not work, so I added this extra lines to my config files:
 

 <servicehostingenvironment aspnetcompatibilityenabled="true">
            <serviceactivations>
                <add relativeaddress="ServiceName.svc" service="ServiceName" factory="System.ServiceModel.Activation.WebServiceHostFactory" />
            </serviceactivations>
        </servicehostingenvironment>

 
Now every thing is fine, when ever I want to disable this service, I can remove the related settings in the config file!
 
Thank you.