c# - Using EntityFramework Include with OfType -

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in query need include (to avoid lazy loading) list of entities.

query.include(x => x.actionvalues.select(a => a.actionvaluedetails));

this works without problems in cases need eager loaded property of actionvaluedetail. actionvaluedetail base class of many other implementations of it. code looks these cases:

query.include(t => t.actionvalues.select(a => a.actionvaluedetails.oftype<actionvaluedetailspecial>().select(d => d.specialdetail)));

but throws exception.

the include path expression must refer navigation property defined on type. use dotted paths reference navigation properties , select operator collection navigation properties.

i don't know how solve problem. using lazy-loading or projection not option me in case. need large exports ensure data loaded before we're writing stream.

any great!


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