private void button3_Click(object sender, EventArgs e)
{
YoneticiGirisi Giris = new YoneticiGirisi();
Giris.Show();
this.Hide();
}
private void btnYonetici_Click(object sender, EventArgs e)
{
YoneticiGirisi yoneticiGirisi = new YoneticiGirisi();
yoneticiGirisi.Show();
this.Hide();
}