Description

We have updated all our projects to support .NET 9.0. As previously noted, our projects use a custom theme that functions well in .NET 8.0 and other frameworks but has been causing issues specifically in .NET 9.0.

We have logged this issue #10020 and received the recommendation: "The issue is due to a recent change to optimize DynamicResource usage (#5610). To prevent the crash, you can opt-out of this behavior by adding the following to your .csproj file:

<ItemGroup>
    <RuntimeHostConfigurationOption Include="Switch.System.Windows.Controls.DisableDynamicResourceOptimization" Value="true" />
</ItemGroup>

This solution has resolved the issue in some sample projects. However, we still encounter problems in other cases when using themes:

In our DataGrid control, we use RadioButtons in the filter functionality, but we are encountering issues when clearing filters.

Steps to Reproduce:

1. Open the Filter Popup and apply a filter using the Advanced Filter options (e.g., Text Filter or Numeric Filter).
2. Use the first filter option to apply a filter.
3. Select the "And" option, which deselects the default "Or" option.
4. Click the OK button to apply the filter.
5. Reopen the Filter Popup and click Clear Filter.

Expected Behavior:

• The "And" option should be deselected, and only the "Or" option should remain selected by default.

Actual Behavior:

• Both "And" and "Or" options remain selected simultaneously, which is incorrect.

Expected Behavior Screenshot(Net 80):

Actual Behavior Screenshot(Net 90):

Note: We have also included <RuntimeHostConfigurationOption Include="Switch.System.Windows.Controls.DisableDynamicResourceOptimization" Value="true" /> in the .NET 9.0 project ItemGroup.

We’ve attached sample projects demonstrating this issue and video references for Issue replication.

Could you please investigate further?
Samples.zip
Video References.zip