private void btn_kiralamasil_Click(object sender, EventArgs e) { int donenveri = bll.KiralamaSil(kiralamaID); if (donenveri > 0) { MessageBox.Show("Kiralama İşlemi Silindi!", "Bilgilendirme!", MessageBoxButtons.OK, MessageBoxIcon.Information); KiralamaGoster(); } else { MessageBox.Show("Kiralama İşlemi Silinemedi!", "Uyarı!", MessageBoxButtons.OK, MessageBoxIcon.Information); } }