Exception appears when Narrator is active and user tries to add row after removing of another row.

• .NET Core Version: 5.0.100-rc.2.20479.15

• Have you experienced this same bug with .NET Framework?: No

Minimal repro:

1. Create the application with a DataGridView
2. Add a several rows to the DataGridView.
3. Or just use the attached project (4228.zip)
4. Run the application.
5. Start editing the last row (row to add a new row)
6. Delete the last row with data
7. Start editing the last row (row to add a new row)

Actual behavior: The error is displayed.

System.Windows.Forms.dll!System.Windows.Forms.AccessibleObject.Interop.UiaCore.IRawElementProviderFragment.FragmentRoot.get() Line 657	C#
[External Code]	
System.Windows.Forms.dll!System.Windows.Forms.Application.ComponentManager.Interop.Mso.IMsoComponentManager.FPushMessageLoop(System.UIntPtr dwComponentID, Interop.Mso.msoloop uReason, void* pvLoopData) Line 345	C#
System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Interop.Mso.msoloop reason, System.Windows.Forms.ApplicationContext context) Line 1111	C#
System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Interop.Mso.msoloop reason, System.Windows.Forms.ApplicationContext context) Line 975	C#
System.Windows.Forms.dll!System.Windows.Forms.Application.Run(System.Windows.Forms.Form mainForm) Line 1198	C#
WindowsFormsApp25.dll!WindowsFormsApp25.Program.Main() Line 20	C#

Expected behavior: The error should not be displayed.

[Zheng-Li01]

Verified the issue with latest 6.0.100-preview.3.21169.6, the issue has been fixed that no exception pops up as below gif.

[merriemcgaw]

I’ll put this on the backlog so we can check it out later.