Fix XamlMessageBox STA Threading Crash from Background Threads#2400

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brianrob merged 3 commits intomicrosoft:mainfrom

brianrob:brianrob/issue-2300

Mar 27, 2026

Commits on Mar 27, 2026

Fix XamlMessageBox STA threading crash from background threads

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review-loop iteration 1: prefer owner dispatcher, guard Application singleton, guard RegisterClassHandler

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review-loop iteration 2: use current STA dispatcher instead of app.Dispatcher in test

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