Program.cs

  var server = MongoServer.Create("mongodb://user:[email protected]:29787");
            server.Connect();
            var database = server.GetDatabase("sx_election2012");
            var collection = database.GetCollection<Doc>("moscow");
            //var t = collection.AsQueryable<Doc>().Where(p => p.boundary.Any(s => Regex.IsMatch(s, "", RegexOptions.IgnoreCase)));
            var q = Query.Matches("district", BsonRegularExpression.Create(".*центр.*", "i"));
            var t = collection.Find(q);
            var zzz = t.ToArray();
            var f = t.First();
            var q1 = Query.Near("station.geo", f.geo.ElementAt(0), f.geo.ElementAt(1), 1);
            var zzz1 = collection.Find(q1).ToArray();