projection wont work in mongodb c# driver -

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i have class executes mongo queries works when send projection in query, projection won't work , mongo return hole document

whats matter?

 query = new querydocument( bsonserializer.deserialize<bsondocument>(querystr));

querystr="{family:'james'},{}" => ok

querystr="{},{family:0}" => not ok. return columns, don't want family column

remember: want method. not methods. because want send query mongo. i've read mapped mongo objects orms.

just want method. thanks

did new c# 2.0 driver documentation? looks projection part of options argument can give findasync

private static void find(imongocollection<person> mongocollection)     {         var query = builders<person>.filter.eq(p => p.name, "bob");          var options = new findoptions<person>()         {             projection = builders<person>.projection                 .include(p => p.name)                 .exclude(p => p.id)         };          var result = await mongocollection.findasync(query, options);

...

the bsondocument object created json {.a.}{.b.} in question has 2 braces-pairs, , first 1 matter (a). ok, since projection , query 2 separate items. personally


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