private void LoadDataToCollection() { AutoCompleteStringCollection auto1 = new AutoCompleteStringCollection(); txtSearch.AutoCompleteMode = AutoCompleteMode.Append; txtSearch.AutoCompleteSource = AutoCompleteSource.CustomSource; txtSearch.AutoCompleteMode = AutoCompleteMode.Suggest; txtSearch.AutoCompleteSource = AutoCompleteSource.CustomSource; string[] arrayName = mySvBUL.LayDsIDSv().ToArray(); foreach (string name in arrayName) { auto1.Add(name); } txtSearch.AutoCompleteCustomSource = auto1; txtSearch.AutoCompleteCustomSource = auto1; }