private void btndelete_Click(object sender, EventArgs e) { if (MessageBox.Show("Are you sure you want to delete the resident in " + txtapartiment.Text + "?", "Warning!", MessageBoxButtons.YesNo) == DialogResult.Yes) { ClsSqlServer DeleteCommand = new ClsSqlServer(); DeleteCommand.DeleteCustomer(txtapartiment.Text); MessageBox.Show("Data Deleted Successfully", "Information"); txtapartiment.Text = ""; txtfname.Text = ""; txtlname.Text = ""; cmbgender.Text = ""; txtphone.Text = ""; cmbpayment.Text = ""; dTPicker1.Value = DateTime.Today; } else { txtapartiment.Focus(); } }