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[release/10.0] Add property and event parent lookup table entries in AddPropertyToPropertyMap and AddEventToEventMap#125742

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[release/10.0] Add property and event parent lookup table entries in AddPropertyToPropertyMap and AddEventToEventMap#125742
github-actions[bot] wants to merge 1 commit intorelease/10.0from
backport/pr-125536-to-release/10.0

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@github-actions github-actions bot commented Mar 18, 2026

Backport of #125536 to release/10.0

/cc @tommcdon

Customer Impact

  • Customer reported
  • Found internally

Multiple successive edits to an ASP.NET Core Project, esp. both cshtml or cs, results in an unhandled ArgumentOutOfRangeException on the target application.

This issue has been reported by customer on #125534 (which was copied from Visual Studio feedback item Hot Reload: Token id is not valid in the scope of module System.ModuleHandle) and dotnet/sdk#48182.

Regression

  • Yes
  • No

Regressed in .NET 9 according to dotnet/sdk#48182

Testing

Internal Visual Studio testing has been updated to cover this scenario

Risk

Low

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Tagging subscribers to this area: @steveisok, @tommcdon, @dotnet/dotnet-diag
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