Linq to Entities Multiple left outer Joins in VB.NET

I am using Linq to entities which does not allow the .DefaultIfEmpty method. I need to know how to preform the following Multiple left outer join using Linq to Entities in VB.net

select * from cap开发者_开发技巧italrequests 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'