Custom .NET Standard 2.0 components aren't displayed in Toolbox in VisualStudio v17.8
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- C#
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Description
### Environment
Microsoft Visual Studio version 17.8.0
### .NET version
.NET 6.0 - WinForms
### Did this work in a previous version of Visual Studio and/or previous .NET release?
Yes, it works in Visual Studio v17.6.5.
### Issue description
Hi, I'm from DevExpress.
Our users encountered an issue where some of our components are not displayed in WinForms .NET OOP DesignTime. In our .NET Standard 2.0 libraries, we have custom inheritors of the Component class. This issue started in Visual Studio v17.8 (or earlier). After a little research, it appears to be related to the following tab: [https://github.com/microsoft/winforms-designer/pull/5231/](https://github.com/microsoft/winforms-designer/pull/5231/). To demonstrate the issue, we created a small example.
### Steps to reproduce
To reproduce it, follow these steps.
1. Download and unzip [NetStandardProblem.zip](https://github.com/dotnet/winforms/files/13498299/NetStandardProblem.zip).
2. Open the designer Form1.cs.
3. Make sure that MyComponent from ClassLibrary1 is not displayed in the toolbox.
### Diagnostics
_No response_
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Assessment
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