Miscellany

namespace InvoiceTotal
{
	public partial class frmInvoiceTotal : Form
	{


        public frmInvoiceTotal()
		{
			InitializeComponent();
		}

		private void btnCalculate_Click(object sender, EventArgs e)
		{
			decimal subtotal = Decimal.Parse(txtSubtotal.Text);  // Converted this expression to parse
			decimal discountPercent = .25m;
			decimal discountAmount = Math.Round(subtotal * discountPercent, 2);
			decimal invoiceTotal = Math.Round(subtotal - discountAmount, 2);

			txtDiscountPercent.Text = discountPercent.ToString("p1");
			txtDiscountAmount.Text = discountAmount.ToString("c");
			txtTotal.Text = invoiceTotal.ToString("c");

			txtSubtotal.Focus();
		}

		private void btnExit_Click(object sender, EventArgs e)
		{
			this.Close();
		}

	}
}