private string GetAllergyByHN(String HN) { try { Service.WS_TrakcareCls ws = new Service.WS_TrakcareCls(); DataTable dt = ws.GetAllAllergyByHN(HN); List <string> allery = dt.AsEnumerable().Select(x => x.Field <string>("Allergy")).ToList(); if (allery != null && allery.Count() > 0) { return(string.Join(Environment.NewLine, allery)); } return("No Know Allergy"); } catch (Exception ex) { Program.MessageError("RetrieveArrivedCls", "GetAllergyByHN", ex, false); return(""); } }