private void telefonKılıflarıToolStripMenuItem_Click(object sender, EventArgs e)
{
PhoneCaseManage f = new PhoneCaseManage();
f.MdiParent = this;
f.Show();
}
private void kılıflarToolStripMenuItem_Click(object sender, EventArgs e)
{
PhoneCaseManage pcM = new PhoneCaseManage();
pcM.MdiParent = this;
pcM.Show();
}