private void etudiantsToolStripMenuItem_Click(object sender, EventArgs e)
{
Gestion_Etudiants gst_etd = new Gestion_Etudiants();
gst_etd.MdiParent = this;
gst_etd.Show();
}
private void Container_Load(object sender, EventArgs e)
{
Gestion_Etudiants gst_etd = new Gestion_Etudiants();
gst_etd.MdiParent = this;
gst_etd.Show();
}