FeatureActivated.cs

public override void FeatureActivated(SPFeatureReceiverProperties properties)
        {
            try
            {
                SPSecurity.RunWithElevatedPrivileges(delegate()
                {
                    SPWebApplication parentWebApp = (SPWebApplication)properties.Feature.Parent;                    
                    SPSite site = properties.Feature.Parent as SPSite;
                    DeleteExistingJob(JobName, parentWebApp);
                    CreateJob(parentWebApp);
                });
            }
            catch(Exception ex){
                throw ex;
            }
        }