private void simpleButton2_Click(object sender, EventArgs e)
{
BusinessClass.ConfigDB(2);
txtDB2.Text = BusinessClass.SecondConn.GetConnectionString();
List <string> tableNames = BusinessClass.SecondTables;
cboTable2.Properties.Items.AddRange(tableNames);
if (cboTable2.Properties.Items.Count > 0)
{
cboTable2.SelectedIndex = 0;
}
}