private void dgOrders_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
    {
        if (e.CommandName == "DeleteOrder")
        {
            string argsID = e.CommandArgument.ToString();

            long OrderID = Convert.ToInt32(argsID);


            if (OrderID > 0)
            {
                PCSN.InvoiceSystem.BusinessLogicLayer.Order Order = new PCSN.InvoiceSystem.BusinessLogicLayer.Order();
                Order.DeleteOrder(OrderID);
                lblErrorMessage.Text = "Order Deleted Successfuly.";
                PopulateOrders();
            }
        }
    }