Unable to un-set values on Windows

[mattleibow]

Description

If you set a button border width and then try unset it - either via setting to -1 or calling ClearValue - does not do the correct thing.

It calls ClearValue in the handler, but this actually clears the ThemeResource set via the WASDK framework.

Related to

• Calling ClearValue if a color is null on WinUI is incorrect behavior #4356
• Entry background not accurate when changed with Triggers #5084

And related to:

• Question: Best way to force reevaluate of ThemeResource binding microsoft/microsoft-ui-xaml#5457
• Updating ResourceDictionary in code behind doesn't fire change notification microsoft/microsoft-ui-xaml#4443
• Proposal: Add Application.ApplyThemes method microsoft/microsoft-ui-xaml#4651
• https://dev.azure.com/microsoft/OS/_workitems/edit/39897009/

Version with bug

6.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

All

Did you find any workaround?

No response

Relevant log output

No response