Add Tests related to Code Dom Serializers

[zsd4yr]

We have a testing gap for types in System.Windows.Forms.Design/src/System/ComponentModel/Design/Serialization

We would like to add tests in this area.

/cc @DustinCampbell

This issue is now marked as "up for grabs", and we’re looking for a community volunteer to work on this issue. If we receive no interest in 120 days, we will close the issue. To learn more about how we handle feature requests, please see our documentation.

Happy Coding!

[elachlan]

@dreddy-work This is a duplicate of #719