CRM users image from AD

Hi

Where do i add this code this code for updating crm users image from AD?

var directoryEntry =newDirectoryEntry("LDAP://"+ domain, adminusername, adminpassword);var directorySearcher =newDirectorySearcher(directoryEntry);

            directorySearcher.Filter=string.Format("(&(SAMAccountName={0}))", updateduserdomainname);var user = directorySearcher.FindOne();int count =((System.Collections.ReadOnlyCollectionBase)(user.Properties["thumbnailPhoto"])).Count;if(count >0){var bytes = user.Properties["thumbnailPhoto"][0]asbyte[];Entity updateentity =newEntity("your entity name");
                updateentity.Id="entityid";
                updateentity["entityimage"]= bytes;
                service.Update(updateentity);}