asp.net – List的实现正在丢失原始查询的排序

IQueryable<Meeting> meetings = e.Meetings
    .Include(m => m.MeetingStage)
    .Include(m => m.MeetingType)

此查询已应用OrderBy.

然后我想从这个查询中选择一个新对象MeetingSearchResult.但是,我发现在某些情况下,正在改变排序,正如这些测试所证明的那样

var temp2 = sortedMeetings.Select(m => m.MeetingID);

System.Diagnostics.Debug.WriteLine(string.Join(" / ",temp2.ToList().ToArray()));

var temp4 = sortedMeetings.Select(m => new MeetingSearchResult()
{
       MeetingID = m.MeetingID,CompanyName = m.CompanyName
});

System.Diagnostics.Debug.WriteLine(string.Join(" / ",temp4.ToList().Select(m => m.MeetingID).ToArray()));

var temp8 = sortedMeetings.Select(m => new MeetingSearchResult()
{
      MeetingID = m.MeetingID,CompanyName = m.CompanyName,MeetingDate = m.MeetingDate,MeetingStage = m.MeetingStage.Description
});

System.Diagnostics.Debug.WriteLine(string.Join(" / ",temp8.ToList().Select(m => m.MeetingID).ToArray()));

这里调试器的输出是：

2493 / 4228 / 7029 / 8254 / 9375 / 10563 / 11716 / 10500
2493 / 4228 / 7029 / 8254 / 9375 / 10563 / 11716 / 10500
2493 / 4228 / 7029 / 8254 / 9375 / 10500 / 10563 / 11716

temp8中对象的顺序已更改.有谁能解释一下？

更多信息：

人们已经要求提供有关sortedMeetings的更多信息.

var sortedMeetings = meetings.DoMeetingSort(sort,ascending);

我的扩展DoMeetingSort如下.我删除了不适用的开关案例：

public static IQueryable<Meeting> DoMeetingSort(this IQueryable<Meeting> query,Constants.MeetingSortColumn column,bool ascending)
    {
        switch (column)
        {
            case Constants.MeetingSortColumn.MeetingType:
                return ascending
                    ? query.OrderBy(m => m.MeetingType.Description).ThenBy(m => m.MeetingDate).ThenBy(m => m.CompanyName)
                    : query.OrderByDescending(m => m.MeetingType.Description).ThenByDescending(m => m.MeetingDate).ThenByDescending(m => m.CompanyName);
        }
    }