public void Conn()
        {
            string commandText = "Select * from spr_sector order by id";
            string Connect = "Database=base;Data Source=localhost;Port=3307;User Id=user1;Password=user1";
            MySqlConnection myConnection = new MySqlConnection(Connect);
            MySqlCommand myCommand = new MySqlCommand(commandText, myConnection);
            
            myConnection.Open();

            MySqlDataAdapter adapter = new MySqlDataAdapter();
            adapter.SelectCommand = myCommand;
            DataSet ds1 = new DataSet();
            DataTable d = new DataTable();
            adapter.Fill(ds1); 

            MySqlDataReader reader = myCommand.ExecuteReader();
            
            int i;
            i = 0;
            while (reader.Read())
            {
                if (reader["id"]>10) // как вытащить запись в формате int64; 
                {
                    treeView1.Nodes.Insert(i, reader["name"].ToString());
                    i++;
                }
            }