private void FilltxtAutoComplete() { selyear = Convert.ToInt32(BPSUtilitiesV1.NZ(mcboYear.SelectedValue, 0)); AutoCompleteStringCollection collection = new AutoCompleteStringCollection(); var source = catbal.GetCatCodes(selyear); foreach (string i in source) { collection.Add(i); } mtxtCatCode.AutoCompleteMode = AutoCompleteMode.Suggest; mtxtCatCode.AutoCompleteSource = AutoCompleteSource.CustomSource; mtxtCatCode.AutoCompleteCustomSource = collection; }