private void DataBaseNameSelector_Load(object sender, EventArgs e)
 {
     connection = DBReader.connectionCreatorWithNoDatabase();
     try
     {
         DBReader.connectionOpen(connection);
         comboBoxFill();
     }
     catch (MySqlException ex)
     {
         MessageBox.Show(ex.Message);
     }
     finally
     {
         DBReader.connectionEnd(connection);
     }
 }