private void f_FormClosed(object sender, FormClosingEventArgs e)
{
ConnectionClass.myClose();
}
/// <summary>
/// To close connection to database and exit from application.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
ConnectionClass.myClose();
Application.Exit();
}