Linq 0..1-one協會

Question

嗨我有一個Linq的大問題。我必須做這兩個類中的0 .1一對一的關聯：

[Table(Name = "TB_Points")] 
public class Point 
{ 
     private int _ID = 0; 
     [Column(Storage = "_ID", DbType = "Int NOT NULL IDENTITY", IsPrimaryKey = true, IsDbGenerated = true)] 
     public int ID { get { return this._ID; } } 
} 

[Table(Name = "TB_TimePoint")] 
public class TimePoint 
{ 
     private int _ID = 0; 
     [Column(Storage = "_ID", DbType = "Int NOT NULL IDENTITY", IsPrimaryKey = true, IsDbGenerated = true)] 
     public int ID { get { return this._ID; } } 

     //here is the association 
     public Point Pos { get; set; } 
} 

點是我的一般類，所以有時一個點可以不存在的時間點，所以在那裏爲null該協會。而且我不需要知道Point類中的TimePoint。 我所有的嘗試都失敗了。我不知道問題是在IsDbGenerated = true還是其他東西。請幫忙。 Thx

Answer 1

典型的做法是讓TimePoint的主鍵也是是Point的主鍵的外鍵。