Object instance not saved in user.settings?

Question

.NET

Created a class derived from ApplicationSettingsBase using LocalFileSettingsProvider
all fields in it user parameters
one of the properties is an object
that I prepared for serialization
during saving and loading the object does not pass the
object this [Serializabled] class with a public constructor without parameters with
a couple of string variables
and a sheet [Serializabled] class with a public constructor without parameters
How can objects be stored through this mechanism?

Answer 1

implemented the IXmlSerializable class and it began to be written / read.
What other ways to solve this situation are there?