The first example from MongoDB documentation is not working.

Here is the structure of my document:

_id: ObjectId;

is_approved: Boolean;

text:String;

The code of my entity is following:
public class Joke
{
public ObjectId Id { get; set; }
public string text { get; set; }
public bool is_approved { get; set; }
{color:#d4d4d4}}
I'm trying the following code:
IMongoClient client = new MongoClient(AppSettings.MongoCredentials);
IMongoDatabase database = client.GetDatabase("joker");
IMongoCollection<Joke> collection = database.GetCollection<Joke>("jokes");
Joke joke = collection.Find(new BsonDocument()).First();
 

The last line gives an exception:

---> System.FormatException: Cannot deserialize a 'String' from BsonType 'ObjectId'.

at MongoDB.Bson.Serialization.Serializers.StringSerializer.DeserializeValue(BsonDeserializationContext context, BsonDeserializationArgs args)

at MongoDB.Bson.Serialization.Serializers.SealedClassSerializerBase`1.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)

at MongoDB.Bson.Serialization.Serializers.SerializerBase`1.MongoDB.Bson.Serialization.IBsonSerializer.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)

at MongoDB.Bson.Serialization.IBsonSerializerExtensions.Deserialize(IBsonSerializer serializer, BsonDeserializationContext context)

at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeMemberValue(BsonDeserializationContext context, BsonMemberMap memberMap)

It is worth to mention that the bug can be reproduced in web application. In console app it works fine.