* conditional serialization add only those property which user wants to configure.
* fixed the samples
* fixed the sample String to string issue.
* fixed the sample String to string issue.
* updated the sample
* Added unit test for conditional serialization
* update samples
* remove trailing spaces, update samples
* remove files
* add back files
* build the project in the ci
Co-authored-by: William Cheng <wing328hk@gmail.com>
