Fallback /Opt-out mechanism

[singhashish-wpf]

• Create a mechanism to opt out of the new theme changes
• The user should be able to opt out of the new Theme changes in case of issues.
• Opting out should take the user to the default state.

[danielkornev]

Is my understanding correct that there is no way to cancel Theme changes right now? I moved to .NET 9 and each Theme Change event leads to my app crashing :(

[h3xds1nz]

@danielkornev I guess it would be a good idea to create an issue with the relevant information then.

[danielkornev]

Created one:
#9906

Not sure if it's going to help or not. I mean I wish it would but our app is quite big and complex.

[miloush]

What is it that needs opting out? Are we using Fluent theme by default?

[danielkornev]

Used Fluent theme by default by using ResourceDictionary.

[danielkornev]

Oh, user should be able to opt out of theme changes.

[xlsupport]

a) Designer isn't able to properly display Fluent. (e.g. DataGrids/ListViews are shown as white rectangles, with gridlines but no content)
Thus I need to switch to Aero for my Designer and Fluent for my runtime. And constantly run my app to see what's where and how it actually looks. Complicating factor: Styles need to use BasedOn resources.

My current workaround is a (Merged) ResourceDictionary with dummy resources for each BasedOn I'm actually using.
Then commenting out either the Fluent or the Dummy resdic.