Linq To Sql进阶系列（一）-从映射讲起

[Table(Name="Orders")]
public partial class Order : INotifyPropertyChanging, INotifyPropertyChanged
{
[Association(Name="Order_OrderDetail", Storage="_OrderDetails", OtherKey="OrderID")]
public EntitySet<OrderDetail> OrderDetails
{
get
{
return this._OrderDetails;
}
set
{
this._OrderDetails.Assign(value);
}
}
}

[Table(Name="Order Details")]
public partial class OrderDetail : INotifyPropertyChanging, INotifyPropertyChanged
{
private EntityRef<Order> _Order;
[Association(Name="Order_OrderDetail", Storage="_Order", ThisKey="OrderID", IsForeignKey=true)]
public Order Order
{
get
{
return this._Order.Entity;
}
set
{
Order previousValue = this._Order.Entity;
if (((previousValue != value)
|| (this._Order.HasLoadedOrAssignedValue == false)))
{
this.SendPropertyChanging();
if ((previousValue != null))
{
this._Order.Entity = null;
previousValue.OrderDetails.Remove(this);
}
this._Order.Entity = value;
if ((value != null))
{
value.OrderDetails.Add(this);
this._OrderID = value.OrderID;
}
else
{
this._OrderID = default(int);
}
this.SendPropertyChanged("Order");
}
}
}
}