Web Browser control object creation give me error when application in multi threaded mode

[shishiraltysys]

.NET version

.net 7

Did it work in .NET Framework?

Yes

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

Not sure about it

Issue description

If I was creating object inside separate single thread mode, but after creating these object i need to add these control in another window control i.e. (Spilite Container) panel.

Steps to reproduce

I have 2 thread when open any form, one is main thread that basically a communication thread a Pipe communication and then UI thread responsible for UI forms. Please help me. If you need anything please let me know

[shishiraltysys]

@radical @shanselman @AArnott @timheuer Please help me this one is the blocker for me

[AArnott]

@shishiraltysys Please do not mention github user accounts that you don't personally know or that don't work on the repo you're on. I for one do not work on winforms, and I know at least some others you mentioned don't either. It just creates noise for us and there's really nothing we can do to help you here.

[lonitra]

@shishiraltysys Can you provide more detailed repro steps so we can understand the scenario a bit more? Ideally a sample project would be helpful here that shows it was working in Framework then moving to .NET 7 it no longer works.

[shishiraltysys]

@lonitra Sorry for the delay, I have created POC and attached here. POC Detail In POC we have 3 application

1. Net Framework Application [Legacy]
2. Net 7 Application [New]
3. Net standard [communicator in between both app]

Steps

Step 1: Run both the [Legacy] & [New] App parallel Step 2: Click on Button in [Legacy] App, It's called namepipeclient and pass message to [New] app message Received function Step 3: You can see message "NET7 Message Received," and then I am creating the object of Web browser You can see I am getting the above error Step 4: This is not part of this POC, but I also tried to open a new form object here, and in that form, i created a web browser object and got the same error.

I hope this will help you. WebBrowserLauncher.zip

[lonitra]

@shishiraltysys Thank you for the repro steps! I am able to repro what you are seeing. Looking at the code, I am not so sure we had this working on .NET Framework. In issue you mentioned that this was working in .NET Framework, could you clarify how this was working for you in Framework?

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