private void barButtonItem19_ItemClick(object sender, ItemClickEventArgs e)
{
Add__Courses add = new Add__Courses();
add.Show();
}
private void navBarItem15_LinkClicked(object sender, DevExpress.XtraNavBar.NavBarLinkEventArgs e)
{
Add__Courses d = new Add__Courses();
d.Show();
}
private void metroTile16_Click(object sender, EventArgs e)
{
Add__Courses ac = new Add__Courses();
ac.ShowDialog();
}