Key Change:

Fixes an exception with NumericUpDown styles. See #3756 for details.

Full Changelog: https://github.com/MaterialDesignInXAML/MaterialDesignInXamlToolkit/compare/v5.2.0...v5.2.1

A big thank you to everyone who contributed (either with issues or pull requests): @aqingGitHub @corvinsz @JorisCleVR @nicolaihenriksen @ssongone