groupby not allow include

Posted by user276640 on Stack Overflow See other posts from Stack Overflow or by user276640
Published on 2010-03-19T11:59:18Z Indexed on 2010/03/19 12:01 UTC
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groupby

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include

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LINQ

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null

i use such code

_dataContext.Invoice.Include("Projects").Where(i => i.Paid == true).GroupBy(i => i.Projects.Id).OrderBy(grouping => grouping.Max(i => i.Projects.Id)).Take(3);

but object Projects is null, but another code is working

 _dataContext.Invoice.Include("Projects").OrderBy(i => i.DateCreated).ToList();

what the problem?

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