Linq to Entities VB.NET中的多个左外连接

Question

我正在将Linq用于不允许.DefaultIfEmpty方法的实体。我需要知道如何使用Linq to VBities中的实体预先形成以下多个左外连接

select * from capitalrequests cr 
left outer join capitalrequestquotes crq on cr.ID = crq.CapitalRequestID 
left outer join la_vendor lv on crq.vendorid = lv.id where cr.id='84D6A08D-5D59-47F9-BF0C-F41F9F5A6FF9'