Linq 林克'；不在'；查询不符合我的期望

我用Linq编写了以下查询：

var res =  dc.TransactionLoggings
             .Where(
                x => !dc.TrsMessages(y => y.DocId != x.DocId)
              ).Select(x => x.CCHMessage).ToList();

这项决议如下：

SELECT [t0].[CCHMessage]
FROM [dbo].[TransactionLogging] AS [t0]
WHERE NOT (EXISTS(
    SELECT NULL AS [EMPTY]
    FROM [dbo].[TrsMessages] AS [t1]
    WHERE [t1].[DocId] <> [t0].[DocId]
    ))

我的LINQ Station有什么问题吗

var res =  dc.TransactionLoggings
             .Where(tl => !dc.TrsMessages.Any(trsm=> trsm.DocId == tl.DocId))
             .Select(x => x.CCHMessage).ToList();

或

---

你真的想拥有

=？
var res =  dc.TransactionLoggings
             .Where(tl => !dc.TrsMessages.Any(trsm=> trsm.DocId == tl.DocId))
             .Select(x => x.CCHMessage).ToList();

   var trsMessagesDocId = dc.TrsMessages.Select(trsm => trsm.DocId).ToList();

   var res = dc.TransactionLoggins
                .Where(tl => !trsMessagesDocId.Contains(tl.DocId))
                .Select(tl => tl.CCHMEssage)
                .ToList();