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[Windows] Auto-hidden Windows taskbar does not appear when Avalonia app is maximized with ExtendClientAreaToDecorationsHint=True #19593

@love-linger

Description

@love-linger

Describe the bug

On Windows, if Automatically hide the TaskBar is enabled, when a window with ExtendClientAreaToDecorationsHint=True is maximized, the Windows TaskBar does not appear while hovering over the bottom part of screen.

To Reproduce

  1. Toggle Automatically hide the TaskBar in Windows Settings.
  2. Open ControlCatalog.Desktop.exe and go to Window Customizations to make sure the Extend Client Area To Decorations option is checked.
  3. Maximize ControlCatalog.Desktop
  4. Hover over the bottom part of screen.

Expected behavior

When hovering over the bottom of screen, the Windows TaskBar should appear.

Avalonia version

11.3.5

OS

Windows

Additional context

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