"ObjectDisposedException" When Toggling Header/Footer in CollectionView Dynamically

[praveenkumarkarunanithi]

Description

When dynamically toggling the header or footer in a CollectionView by setting it to null and then re-assigning it, a System.ObjectDisposedException occurs. The exception message indicates that a disposed object.

"Make sure that in the MauiProgram file, the CollectionView2 handlers are not registered or used."

Steps to Reproduce

1. Open and run the attached CollectionView sample code in sandbox project.
2. Click the "Toggle Header" button once and observe that the header is removed from the UI.
3. Click the "Toggle Header" button again to re-add the header to the CollectionView.
4. Observe that an exception is thrown at this point.

Link to public reproduction project repository

No response

Version with bug

8.0.92 SR9.2

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, macOS

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

No response

[praveenkumarkarunanithi]

Issue reproduced with iOS 18.1 in iphone 16 with maui sandbox project code removed in MauiProgram on the sandbox app that uses the CollectionView2 Handlers.
CollectionViewHeaderException.zip

[jaosnz-rep]

I can repro this issue at macOS platform on the latest VS Code for Mac(1.95.1)(9.0.0-rc.2.24503.2 & 8.0.92).