Linq表达式多个左外联接错误

我无法执行以下linq

   var items(  from p in Patients 
    join q in MURWorksheets on p.PatientId equals q.PatientId into step1
    from s in step1.DefaultIfEmpty()
    join t in MURWorksheetAnswers on s.MURWorksheetId equals t.MURWorksheetId into step2


    from s2 in step2.DefaultIfEmpty()

    select new {p.FirstName , Date = (s.MURDate == null ? DateTime.Now.Date : s.MURDate),
    s2.MURQuestionnaireId,s2.MURExpctedAnswersId}).ToList();

以下是相同的sql，供您参考

select a.FirstName,b.MURDate,c.MURQuestionnaireId,c.MURWorksheetAnswersID from Patients as a
left join MURWorksheet as b on a.PatientId = b.PatientId
left join MURWorksheetAnswers as c on b.MURWorksheetId = c.MURWorksheetId

---

粘贴的代码中缺少等号：

var items = (from p in Patients 
    join q in MURWorksheets on p.PatientId equals q.PatientId into step1
    from s in step1.DefaultIfEmpty()
    join t in MURWorksheetAnswers on s.MURWorksheetId equals t.MURWorksheetId into step2


    from s2 in step2.DefaultIfEmpty()

    select new {p.FirstName , Date = (s.MURDate == null ? DateTime.Now.Date : s.MURDate),
    s2.MURQuestionnaireId,s2.MURExpctedAnswersId}).ToList();

---

是否有错误消息？是，使用LinqPad

；“

中应有无效的表达式项”中是否有两个错误；“应有”和“中应有无效的表达式项”？你能编辑这个问题并将代码包含在你的课堂中吗？我假设你的代码是“var items=…”而不是“var items（…”？谢谢GrandMasterFlush，如果你在答案中发布，你会得到分数的。非常感谢，你的答案是camse 1st