Winforms - want Combobox(dropdown) items in sorted order

Hi

I had one comboBox which displays all country names. Data is coming but not in sorted order. I used Hashtable to which data comes thorugh query

public void GetCountryNames(ref Hashtable ht1, ref Hashtable ht2)
        {
            OracleCommand vCountrynames;

                vCountrynames = new OracleCommand(sqlcommandfile.GetCountrynames, oracleCon);               
         
            try
            {
                oracleCon.Open();

                OracleDataReader Reader = vCountrynames.ExecuteReader(CommandBehavior.SingleRow);

                while (Reader.Read())
                {
                    ht1.Add(Reader.GetString(0), Reader.GetString(1));
                    ht2.Add(Reader.GetString(1), Reader.GetString(0));
                }
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
            }
            finally
            {
                oracleCon.Close();
            }
        }

"Sqlcommandfile.GetCountrynames" will fetch data through Query. Given below is the query.

SELECT ITEM_NAME, ITEM_KEY FROM COUNTRY_CODE WHERE ITEM_ID='1220' and FLG= 1 ORDER BY ITEM_KEY

while debugging i found , after reader operation, ht1.Add() is there, here while adding to Hash table not adding in sorted order


Can any one help how to get sorted list

Madhavi