Memory leak when using `WindowHelper.UseModernWindowStyle="True"`

[TBM13]

Describe the bug

When using WindowHelper.UseModernWindowStyle="True" on a Window, the window is kept alive forever on memory even after it is closed.

Reproduction

1. Add WindowHelper.UseModernWindowStyle="True" to a window
2. Close it
3. Force various GC collections
4. Take a memory snapshot; the Window is still there

When WindowHelper.UseModernWindowStyle is not set, this does not happen

Suggested Solution

The issue seems to be caused by TitleBarControl's descriptor_WindowStyle. descriptor_WindowStyle.RemoveValueChanged() is likely never being called.

Library Version

Using the lib built from commit e6d5df2

Operating System

Windows 11

Framework

.NET Core and .NET

Framework Version

10

Source of Package

Other (Tell us in the Additional Notes)

Additional Notes

Package source: https://github.com/iNKORE-NET/UI.WPF.Modern/actions/runs/29908026675

Validations

• Check that there isn't already an issue that reports the same or similar problem.
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[NotYoojun]

@TBM13 Kindly check #439?

[TBM13]

Still having a memory leak when using UseModernWindowStyle, this time it seems to be from the ThemeManager: