c# - First combobox item missing after combobox filled with datatable -

i have combobox on form , datatable. combobox filled row values fro datatable. before add combobox item called (new) first option of combobox in case user add new item.

but when combobox filled, (new) not show reason.

string query = "select id,name,text apsissms order id desc"; oledbdataadapter da = new oledbdataadapter(query, conn); conn.open(); da.fill(dtsmsmessages); combosmsmessages.items.add(new comboboxitem() { text = "(new)", value = "-1" }); if (dtsmsmessages.rows != null && dtsmsmessages.rows.count > 0) {     combosmsmessages.items.clear();      (int = 0; < dtsmsmessages.rows.count; i++)     {         comboboxitem item = new comboboxitem()         {             text = dtsmsmessages.rows[i]["name"].tostring(),             value = dtsmsmessages.rows[i]["id"].tostring()         };         combosmsmessages.items.add(item);     } } combosmsmessages.selectedindex = 0; 

combosmsmessages.items.clear(); clear items add combosmsmessages.items.add(new comboboxitem() { text = "(new)", value = "-1" }); after cleared combobox code should

string query = "select id,name,text apsissms order id desc"; oledbdataadapter da = new oledbdataadapter(query, conn); conn.open(); da.fill(dtsmsmessages);  if (dtsmsmessages.rows != null && dtsmsmessages.rows.count > 0) { combosmsmessages.items.clear();  combosmsmessages.items.add(new comboboxitem() { text = "(new)", value = "-1" }); (int = 0; < dtsmsmessages.rows.count; i++) {  comboboxitem item = new comboboxitem()     {         text = dtsmsmessages.rows[i]["name"].tostring(),         value = dtsmsmessages.rows[i]["id"].tostring()     };     combosmsmessages.items.add(item);  } } combosmsmessages.selectedindex = -1;