private void btn_sil_Click(object sender, EventArgs e) { int donenveri = bll.UyeSil(UyeID); if (donenveri > 0) { MessageBox.Show("Üye Silindi!", "Bilgilendirme", MessageBoxButtons.OK, MessageBoxIcon.Information); ListeGoster(); KiralamaGoster(); } else { MessageBox.Show("Üye Silinemedi!", "Hata", MessageBoxButtons.OK, MessageBoxIcon.Information); } }