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Add check for readonly to prevent InvalidOperationException - #659
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July 8, 2026 10:53
When unloading/loading occurs the owner of the window may have changed.
Add null checks and exception handling to prevent runtime errors in the AutoHideWindowManager class. Updated `_closeTimer.Tick` to handle null references and potential `InvalidOperationException` during layout changes. Modified `StopCloseTimer` to use null-conditional operator for safer access.
Updated the SyncInheritedProperty method to return early if the DependencyProperty is read-only, ensuring such properties are not processed or modified.
This was referenced Oct 5, 2026
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The following exception occured when an element inside a Pane was focused using code:
System.InvalidOperationException: Die IsSelectionActive-Eigenschaft wurde als schreibgeschützt registriert und kann ohne Autorisierungsschlüssel nicht geändert werden.
To prevent this from happening the DependencyProperty is checked for the readonly flag.