public void TestExplain()
{
_collection.RemoveAll();
_collection.Insert(new BsonDocument { { "x", 4 }, { "y", 2 } });
_collection.Insert(new BsonDocument { { "x", 2 }, { "y", 2 } });
_collection.Insert(new BsonDocument { { "x", 3 }, { "y", 2 } });
_collection.Insert(new BsonDocument { { "x", 1 }, { "y", 2 } });
var result = _collection.Find(Query.GT("x", 3)).Explain();
}