private void dersToolStripMenuItem_Click(object sender, EventArgs e)
{
bool durum = false;
DersForm ders = new DersForm();
foreach (Form form in this.MdiChildren)
{
if (form.Text == ders.Text)
{
durum = true;
form.Activate();
}
}
if (durum == false)
{
ders.MdiParent = this;
ders.Show();
}
{
}
}
private void toolStripButton1_Click(object sender, EventArgs e)
{
DersForm d1 = new DersForm();
d1.Show();
}