Entity Framework V1, PredicateBuilder, Linq to Entities failed to resolve method?

If you change (or overload) your WithNames and WithGroups to return Expression.

If you change (or overload) your WithNames and WithGroups to return Expression> instead of IQueryable (and similarly for Users, then you can use both of them inside calls to Where. As you've discovered, L2E won't parse (this would essentially require decompiling it) a method, but it can handle an Expression.

Thanks, this works, but doesn't fit into my current repository structure, because it should be some sort of chainig WithXY methods which return IQueryable. But i'm checking a solution which is working with a criteria object. So one writes a query like this: repo.

GetUsers(c => c. WithGroup("Administrators")).ToList() The Cirteria object chains expressions, so I think your solution fit's in there. – Claus Trojahn Jan 12 '10 at 8:45.

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