Window.Visible property throws when window is closed

[stevenbrix]

Describe the bug

it's strange that this API throws an exception when the window has been closed, i would expect it to just return false. and since there is no way to query that the window is in a state where it's closed, there is no way to check that the window is in an OK state to call it other than keeping separate app state around

Steps to reproduce the bug

1. close a window
2. after window has closed, check the Visible property

Expected behavior

No response

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.5.1: 1.5.240311000

Windows version

No response

Additional context

No response

[HO-COOH]

since there is no way to query that the window is in a state where it's closed

Isn't there a Window.Closed event which you can handle?