如何能include外键对应的表？向博客园的兄弟请教！

下面是我的代码：

我在ObjectQuery里include对应外键所在的表，这样起不了左右，对应的表还是null。我知道用VsleaDataEntities.Customers.include("aa");是可以做到的，但我的目的仅仅是为了通用，或者我可以用InvokeMember来做到？

 1         private TEntity GetEntityWithReferenceLoadedById<TEntity>(object entityId)
 2         {
 3             TEntity entity = default(TEntity);
 4 
 5             var query = string.Format("SELECT VALUE Entity FROM {0}.{1} AS Entity "
 6                 + " WHERE Entity.Id = @Id", GetDataEntitiesContainerName(), typeof(TEntity).Name);
 7 
 8 
 9             ObjectQuery<TEntity> objectQuery = new ObjectQuery<TEntity>(query, ObjectContext, MergeOption.NoTracking);
10 
11             objectQuery.Parameters.Add(new ObjectParameter("Id", entityId));
12 
13             List<string> includePathList = this.GetIncludePathList(typeof(TEntity));
14             foreach (string path in includePathList)
15             {
16                 objectQuery = objectQuery.Include(path);
17             }
18 
19             entity = objectQuery.FirstOrDefault();
20 
21             return entity;
22         }