MongoDB.Bson.Serialization.Serializers.BsonDocumentSerializer.Deserialize C# (CSharp) Метод

        public override object Deserialize(
            BsonReader bsonReader,
            Type nominalType,
            Type actualType,
            IBsonSerializationOptions options)
        {
            VerifyTypes(nominalType, actualType, typeof(BsonDocument));

            var bsonType = bsonReader.GetCurrentBsonType();
            string message;
            switch (bsonType)
            {
                case BsonType.Document:
                    var documentSerializationOptions = (options ?? DocumentSerializationOptions.Defaults) as DocumentSerializationOptions;
                    if (documentSerializationOptions == null)
                    {
                        message = string.Format(
                            "Serialize method of BsonDocument expected serialization options of type {0}, not {1}.",
                            BsonUtils.GetFriendlyTypeName(typeof(DocumentSerializationOptions)),
                            BsonUtils.GetFriendlyTypeName(options.GetType()));
                        throw new BsonSerializationException(message);
                    }

                    bsonReader.ReadStartDocument();
                    var document = new BsonDocument(documentSerializationOptions.AllowDuplicateNames);
                    while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
                    {
                        var name = bsonReader.ReadName();
                        var value = (BsonValue)BsonValueSerializer.Instance.Deserialize(bsonReader, typeof(BsonValue), null);
                        document.Add(name, value);
                    }
                    bsonReader.ReadEndDocument();

                    return document;
                default:
                    message = string.Format("Cannot deserialize BsonDocument from BsonType {0}.", bsonType);
                    throw new Exception(message);
            }
        }