private void müşteriToolStripMenuItem1_Click(object sender, EventArgs e) { if (musteri == null) { musteri = new frm_Musteriler(mainBank); musteri.MdiParent = this; musteri.FormClosed += Mus_FormClosed; musteri.Show(); } else { musteri.Activate(); } }
private void Mus_FormClosed(object sender, FormClosedEventArgs e) { musteri = null; }