Repro for .NET MAUI issue #23578

Ref: #23578 - Behavior bindable property with DynamicResource not supported

Repro steps

Scenario 1

1. Run application
2. Observe application output for MyColorPropertyChanged messages

Scenario 1 - Expected behavior

There should be 2 MyColorPropertyChanged trace messages output on startup indicating that the ReproBehavior MyColor property value has been set to red [Color: Red=1, Green=0, Blue=0, Alpha=1].

Scenario 1 - Actual behavior

Only 1 MyColorPropertyChanged trace message is output on startup. In this case, for the property being set with StaticResource. A property value is not set for the behavior using DynamicResource.

Scenario 2

1. Run application
2. Ignore application outputs for MyColorPropertyChanged messages from start-up
3. Click the Switch Theme Button
4. Observe application output for MyColorPropertyChanged messages

Scenario 2 - Expected behavior

There should be a MyColorPropertyChanged trace message output after clicking the Switch Theme Button. In this case, indicating that the ReproBehavior MyColor property, set with DynamicResource, has been updated following changes to resources.

Scenario 2 - Actual behavior

No MyColorPropertyChanged trace message gets output after clicking the Switch Theme Button.

Note

The expected value is being set on startup, and updated based on subsequent changes to resources, when the same DynamicResource is used on the parent Image BackgroundColor property.