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

        public object Deserialize(
           BsonReader bsonReader,
           Type nominalType,
           Type actualType,
           IBsonSerializationOptions options)
        {
            if (actualType != typeof(object))
            {
                var message = string.Format("ObjectSerializer can only be used with actual type System.Object, not type {0}.", actualType.FullName);
                throw new ArgumentException(message, "actualType");
            }

            var bsonType = bsonReader.GetCurrentBsonType();
            if (bsonType == BsonType.Null)
            {
                bsonReader.ReadNull();
                return null;
            }
            else if (bsonType == BsonType.Document)
            {
                bsonReader.ReadStartDocument();
                if (bsonReader.ReadBsonType() == BsonType.EndOfDocument)
                {
                    bsonReader.ReadEndDocument();
                    return new object();
                }
                else
                {
                    var message = string.Format("A document being deserialized to System.Object must be empty.");
                    throw new Exception(message);
                }
            }
            else
            {
                var message = string.Format("Cannot deserialize System.Object from BsonType {0}.", bsonType);
                throw new Exception(message);
            }
        }