private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
        {
            int    uyeID      = Convert.ToInt32(dataGridView1.CurrentRow.Cells[0].Value);
            string adi        = dataGridView1.CurrentRow.Cells[1].Value.ToString();
            string tel        = dataGridView1.CurrentRow.Cells[2].Value.ToString();
            string uyeTipi    = dataGridView1.CurrentRow.Cells[3].Value.ToString();
            string adres      = dataGridView1.CurrentRow.Cells[4].Value.ToString();
            bool   uyeAktifMi = Convert.ToBoolean(dataGridView1.CurrentRow.Cells[5].Value);

            Islemler.GuncelleUye(uyeID, adi, tel, uyeTipi, adres, uyeAktifMi);
        }