linq OrderBy物業上的物業

Question

使用EF4有可能通過財產上的財產，即

具有Name屬性的EntityA。實體B有幾個其他屬性和EntityA。 我想通過EntityA.Name

entityBList = _repo.Find<EntityB>() .OrderBy(x => x.EntityA.Name); 

Answer 1

下令EntityB列表爲什麼不這項工作？我知道這不是使用EF4，但概念是相同的。

using System; 
    using System.Collections.Generic; 
    using System.Linq; 
    using System.Text; 
    using System.Threading.Tasks; 

    namespace LinqOrderByReference 
    { 
     class Program 
     { 
      static void Main(string[] args) 
      { 
       EntityA[] entitiesA = { new EntityA { Ordinal = 3, SecretCode = "xxx"}, 
              new EntityA { Ordinal = 2 ,SecretCode = "x"}, 
              new EntityA { Ordinal = 1 ,SecretCode = "x"} }; 
       EntityB[] entitiesB = { new EntityB { Name = "C", EntityA = entitiesA[2] }, 
              new EntityB {Name = "B", EntityA = entitiesA[1] }, 
              new EntityB {Name = "A", EntityA = entitiesA[0] } }; 

       IEnumerable<EntityB> entitiesBList = entitiesB.OrderBy(x => x.EntityA.Ordinal); 
       foreach (EntityB b in entitiesBList) 
       { 
        Console.WriteLine("EntityB.Name: {0}, Ordinal {1}.", b.Name, b.EntityA.Ordinal); 
       } 
       Console.Read(); 
      } 
     } 

     public class EntityA 
     { 
      public int Ordinal { get; set; } 
      public string SecretCode { get; set; } 
     } 

     public class EntityB 
     { 
      public string Name { get; set; } 
      public EntityA EntityA { get; set; } 
     } 
    } 

輸出是：
EntityB.Name：C，序號1
EntityB.Name：B，序號2
EntityB.Name：A，序號3.

Answer 2

是對name屬性是一個簡單的字符串，還是包含First name和Last Name，如果是的話，它會覆蓋GetHashCode方法？如果是這樣，你可能想看看這個職位What is the best algorithm for an overridden System.Object.GetHashCode?