Web Service Response

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I am not able to capture web service response. Here is the web service method.
        [WebMethod(Description = "Retreive inspector assignment updates.")]
        [return: XmlElement("Project")]
        public Messages.InspectorProjects GetInspectorAssignmentsDiff([XmlElement("FacilityIdentifier")]Messages.CurrentFacilities currentFacilities) {
            try {
                Messages.InspectorProjects projectsDiff;
                projectsDiff = new AcTrakController().GetInspectorAssignmentsDiff(AcTrakToken.InspectorId, currentFacilities);
          &n ...