* Refactor Unit Tests

* Add new certificate provider interface instead of read only certificates list.

* Update ReleaseNotes.md

* Fix Unit Tests

* Fix build

* unit testing hot swappable certificates (#1787)

* Move test classes to correct namespace

* Apply code style

---------
Co-authored-by: NSean Hanna <hannasm@users.noreply.github.com>

This was missing from builder but not regular options.

1681 misleading signature of mqttclientconnectasync mqttclientconnectresultcode expected but throws exception (#1749)

* Add new overload for options builder

* Refactor code

* Update ReleaseNotes.md

* Add compatibility option for AWS

* Fix UWP build

* Fix comment in MqttClientOptions (#1706)

* Refactor naming

* Fix wrong option value

---------
Co-authored-by: NMichi <michael@volz.dev>

* Added dotnet 7 support/builds.

* Added NETCOREAPP_3_1_OR_GREATER where applicable.

* Expose more options in disconnect options.

* Expose more options in disconnect API.

* Refactor code.

* Expose user properties in disconnected event.

* Expose more disconnect options in server.

* Fix build errors

* Add new samples.

* Fix client cleanup

* Fix merge conflicts

* Add feature validation.

* Update ReleaseNotes.md

* Add validators or subscribe and unsubscribe.

* Add feature validation for disconnect.

* Fix build errors.

* Fix build errors
Co-authored-by: NHansM <HansM2013@gmx.de>

This reverts commit a38623cb.