microsoft / microsoft/microsoft-ui-xaml

Crash occurs when enabling localization in Windows 11 OS

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bug needs-triage
Dominant language
C++
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Description

Describe the bug

Hi Team,

In Windows 11 OS, the application is crashed when the application is enabled with localization by using the Custom Control. You can also be able to replicate by using the below sample.

Steps to reproduce the bug

PackLocalizationApp.zip

Open the PackLocalizationApp project.
Run the project in the mentioned OS.
Note, the application is crashed.

Expected behavior

in sample, we have added the localization resw file and missed to define in code behind. it should run properly.

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.8 Experimental 1: 1.8.250515001-experimental2

Windows version

Windows 11 (23H2): Build 22631, Windows 11 (22H2): Build 22621

Additional context

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by opening the attached PackLocalizationApp.zip and reproducing the crash on Windows 11 with the stated Windows App SDK version. Compare the sample's localization resw file and missing code-behind definition, then verify that the application runs without crashing while localization remains enabled.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
desktop, localization
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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