EF5一对多关系导致外键列名称不正确

Question

我正在尝试仅在“很多”方面配置导航的一对多关系，但似乎无法让EF生成正确的列名。

以下是相关架构：

QuoteItem
  Id INT PRIMARY KEY

QuoteItemFiles
  Id INT PRIMARY KEY
  QuoteItemId INT NOT NULL
  FileId INT NOT NULL

Files
  FileID INT PRIMARY KEY (legacy naming convention)

模特：

public class QuoteItem
{
  public int Id { get; set; }
  public ICollection<QuoteItemFile> Attachments { get; set; }
}

public class QuoteItemFile
{
  public int Id { get; set; }
  public File File { get; set; }
  public QuoteItem QuoteItem { get; set; }
}

public class File
{
  public int FileID { get; set; }
}

我正在配置这样的关系：

public class QuoteItemMap()
{
  HasMany(x => x.Attachments)
    .WithRequired(x => x.QuoteItem)
    .Map(x => x.MapKey("QuoteItemId"))
    .WillCascadeOnDelete(true);
}

public QuoteItemFileMap()
{
  HasRequired(x => x.QuoteItem)
    .WithMany(x => x.Attachments)
    .Map(x => x.MapKey("QuoteItemId"))
    .WillCascadeOnDelete(true);
  HasRequired(x => x.File)
    .WithMany()
    .Map(x => x.MapKey("FileId")) <-- This isn't working
    .WillCascadeOnDelete(true);
}

当我尝试访问QuoteItem.Attachments时，我得到“无效的列名'File_FileID'。”

为什么不遵守我的MapKey("FileId")指令？