public ActionResult Identical(string id) { string str = ""; var rs = dcs.Employees.Where(ee => ee.EmployeeNumber == id).ToList(); if (rs.Count > 0) { str += "<b>" + id + "</b>" + " already exists! Please choose another name"; } else if (!em.CheckAlphaNumeric(id) == true) { str += "Character invalid !"; } else { str += ""; } Response.Write(str); return(null); }