Correct typo and formatting

[mikkelbu]

Summary

Correct typo and formatting

Fixes #10875

[learn-build-service-prod]

Learn Build status updates of commit bc1e58d:

✅ Validation status: passed

File	Status	Preview URL	Details
snippets/csharp/System.Windows/Rect/Overview/RectExample.cs	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[gewarren]

Thanks @mikkelbu. Are you able to fix the build error?

[learn-build-service-prod]

Learn Build status updates of commit 406e829:

✅ Validation status: passed

File	Status	Preview URL	Details
snippets/csharp/System.Windows/Rect/Overview/MyApp.xaml	✅Succeeded
snippets/csharp/System.Windows/Rect/Overview/MyApp.xaml.cs	✅Succeeded
snippets/csharp/System.Windows/Rect/Overview/MyApp1.xaml	✅Succeeded
snippets/csharp/System.Windows/Rect/Overview/MyApp1.xaml.cs	✅Succeeded
snippets/csharp/System.Windows/Rect/Overview/RectExample.cs	✅Succeeded	View
snippets/csharp/System.Windows/Rect/Overview/RectExample1.cs	✅Succeeded	View
snippets/csharp/System.Windows/Rect/Overview/Snippets.csproj	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel