public HttpResponseMessage AddtoCompare(string useremail, int productid)
        {
            int?countCompare    = entities.tblCompares.Where(c => c.useremail == useremail).Count();
            int checkproduct    = entities.tblCompares.Where(c => c.useremail == useremail && c.Product_id == productid).Count();
            int?countCategories = entities.proc_Get_Category_Count(productid, useremail).FirstOrDefault();

            if (countCompare == countCategories && checkproduct == 0)
            {
                entities.proc_Insert_Compare(productid, useremail);
                return(Request.CreateResponse(HttpStatusCode.OK, "success"));
            }
            else
            {
                return(Request.CreateResponse(HttpStatusCode.OK, "already present"));
            }
        }