Mine

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public class Order
{
    private DateTime _orderDate;
    private Customer _cust;
    private ShoppingCart _cart;

	public Order()
	{
        _cust = new Customer();
        _cart = new ShoppingCart();
	}
    public Order(DateTime orderDate, Customer Cust, ShoppingCart Cart)
    {
        this.OrderDate = orderDate;
        this.Cust = Cust;
        this.Cart = Cart;
    }
    public DateTime OrderDate
    {
        get
        {
            return _orderDate;
        }
        set
        {
            _orderDate = value;
        }
    }
    public Customer Cust
    {
        get
        {
            return _cust;
        }
        set
        {
            _cust = value;
        }
    }
    public ShoppingCart Cart
    {
        get
        {
            return _cart;
        }
        set
        {
            _cart = value;
        }
    }
    public decimal Subtotal
    {
        get
        {
            decimal subTotal = 0;
            foreach (CartItem item in _cart.GetItems())
            {
                subTotal += item.Total;
            }
        }
    }
    public decimal SalesTax
    {
        get
        {
            if (this.Cust.State.Equals("CA"))
            {
                return this.Subtotal * 0.0775m;
            }
            else
            {
                return 0.0m;
            }
        }
    }
    public decimal Shipping
    {
        get
        {
            int count = 0;
            foreach (CartItem item in _cart.GetItems())
            {
                count += item.Quantity;
                return count * 2.00m;
            }
        }
    }
    public decimal Total
    {
        get
        {
            return this.Subtotal + this.Shipping + this.SalesTax;
        }
    }
}