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Accessibility [Inspect]: Cannot find the RichEdit control of the "Text" property in UIA structure of a PropertyGrid control #2704
.NET Core 5.0.0-alpha.1.19564.1 (also reproduces in earlier versions of .NET Core WinForms.
The issue is that RichEdit control is not shown in the UIA hierarchy of PropertyGrid control children.
Does this work for other popup/dropdown editors in the property grid? (Control editors, including custom editors, have the option to opt-in into either a dropdown or a popup.) If the problem isn't just isolated to RichTextBox it might be worth looking for a general solution so user defined editors can also profit from the solution.
If the solution to this accessibility issue requires certain code in the editor itself it might be worth documenting it, so programmers of user-defined editors can also solve this problem for their own editor implementations.