I'm really sorry to say, but you must recreate your winforms project with the version which has the .NET Framework.
Webbrowser not shown in Toolbox

I have activated the Webbrowser in Extras/Toolboxelements but its not shown in the Toolboxlist.
What do i wrong?
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Dylan Zhu-MSFT 6,366 Reputation points
2020-12-08T02:36:10.397+00:00 Hi RolandLffler,
The web browser control works in windows form project. So please confirm if your project is winform project.
And if it doesn't work, please try to right-click the toolbox, then click "Reset Toolbox".
Best Regards,
Dylan
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Note: Please follow the steps in our **documentation to enable e-mail notifications if you want to receive the related email notification for this thread.**Henri 1 Reputation point2022-09-29T19:15:55.493+00:00 I had the same problem as Roland. I could not find WebBrowser in the toolbox, and none of the tips above worked for me.
What I did instead: I added a Button control where I wanted my WebBrowser control. Then I manually changed the code in the Designer.cs file to replace the button with a WebBrowser instance. Once the control is on the form, I can reposition it normally in the GUI editor.
A bit clunky, but maybe this workaround can help others as well.