.NET 9.0 Error with DialogFileOpen

[Greg66]

.NET version

.NET 9.0

Did it work in .NET Framework?

Yes

Did it work in any of the earlier releases of .NET Core or .NET 5+?

.NET 8.0

Issue description

I created a vb.net projekt with .NET 9.0 via project wizzard. The Project only contains a FileOpenDialog from object pallete. As soon as the dialoge is used the programm unexpectedly closes with the following text:

The program '[11668] TestNet9.exe' has exited with code 3221226505 (0xc0000409).

I changed the project to .NET 8.0 without any further modifications. Now there is no problem anymore!

Steps to reproduce

1. Create new Project with vb.net 9.0
2. Add a new FileOpenDialog
3. Compile and run program
4. Open dialog
5. close dialog
6. wait some seconds (+- 30 seconds)
7. program closes with code 3221226505 (0xc0000409).

[AlexSchlecht]

Additional details to bug report from Greg66

The crash only occurs under the following conditions:

• When working from home with a VPN connection (NetExtender)
• Only with a .NET 9 application (does not occur with .NET 8)
• Only if the ShellExtension InPoint.Shell.ArchivedOverlayIconExtension is enabled
  → If this extension is disabled, the crash does not occur.

Problem

.NET 9 does not throw an exception. Instead, the process terminates silently without any error message or stack trace.

Additional context

The problematic Shell Extension is part of InPoint, a document management system by
Heilig & Schubert Software AG, 1120 Vienna, Austria.
https://hs-soft.com/inpoint-dms-software/

[Daifaizonaldridge]

Hi, I'm a beginner to open-source development but would like to give this a try?