private void button1_Click(object sender, EventArgs e)
        {
            this.Close();
            personeleklee f2 = new personeleklee();

            f2.Show();
        }
        private void personelekle_Click(object sender, EventArgs e)
        {
            a = 1;
            personelduzenle.Visible = false;
            personelekle.Visible    = false;
            personelsil.Visible     = false;
            personelizin.Visible    = false;

            button2.Visible = false;
            personeleklee ekleprs = new personeleklee();

            ekleprs.TopLevel = false;
            ekleprs.Parent   = panel1;

            panel1.Controls.Add(ekleprs);

            ekleprs.Show();
        }