c# - Using an array in a MongoDB aggregation query with $or -

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i'm trying use array in mongodb c# aggregation query $or statement. code follows:

var groupsarray = new bsonarray                           {new bsondocument { { "role", 1 } },                                 new bsondocument { { "role", 2 } },                                 new bsondocument { { "role", 3 } }                           };        var bsonor = new bsondocument                      {                        {                          "$or",                          groupsarray                        }                      };        var match = new bsondocument { { "$match",                                        new bsondocument { { "$or", bsonor } } } };

however, i'm getting following exception: 

mongodb.driver.mongocommandexception:  command 'aggregate' failed: exception: bad query:  badvalue $or needs array (response:  { "errmsg" : "exception: bad query: badvalue $or needs array",  "code" : 16810, "ok" : 0.0 }).

is there specific way use array in query i'm missing?

the or being added twice. code changed 

var groupsarray = new bsonarray();        foreach (var g in groups)       {         groupsarray.add(new bsondocument() { { "role", g.id.tostring() } });       }       var bsonor = new bsondocument                      {                        {                          "$or",                          groupsarray                        }                      };        var match = new bsondocument { { "$match", bsonor } };

and worked hoped.


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