private void btnMusteriEkle_Click_1(object sender, EventArgs e)
        {
            FrmYeniMusteri musteri = new FrmYeniMusteri();

            musteri.Show();
        }
        private void müşteriEkleToolStripMenuItem_Click(object sender, EventArgs e)
        {
            FrmYeniMusteri yeni = new FrmYeniMusteri();

            yeni.Show();
        }