[BUG] Build errors when turning on the CA1305 analyzer

[stephenquan]

Is there an existing issue for this?

• [x] I have searched the existing issues

Did you read the "Reporting a bug" section on Contributing file?

• [x] I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

Split from Issue #2721 and PR https://github.com/CommunityToolkit/Maui/pull/2722.

When turning on the CA1305 analyzer 7 build issues were found in the CommunityToolkit. These issues could lead to unpredictable behavior if the CultureInfo.CurrentCulture is set to a non-US-English language:

F:\Maui\src\CommunityToolkit.Maui.Camera\CameraInfo.shared.cs(99,4): error CA1305: The behavior of 'StringBuilder.Append(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'CameraInfo.ToString()' with a call to 'StringBuilder.Append(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) F:\Maui\src\CommunityToolkit.Maui.Camera\CameraInfo.shared.cs(99,4): error CA1305: The behavior of 'StringBuilder.Append(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'CameraInfo.ToString()' with a call to 'StringBuilder.Append(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) F:\Maui\src\CommunityToolkit.Maui.Camera\CameraInfo.shared.cs(99,4): error CA1305: The behavior of 'StringBuilder.Append(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'CameraInfo.ToString()' with a call to 'StringBuilder.Append(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) F:\Maui\src\CommunityToolkit.Maui.Camera\CameraInfo.shared.cs(99,4): error CA1305: The behavior of 'StringBuilder.Append(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'CameraInfo.ToString()' with a call to 'StringBuilder.Append(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) F:\Maui\src\CommunityToolkit.Maui.Camera\CameraInfo.shared.cs(99,4): error CA1305: The behavior of 'StringBuilder.Append(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'CameraInfo.ToString()' with a call to 'StringBuilder.Append(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) F:\Maui\src\CommunityToolkit.Maui.Core\Essentials\SpeechToText\OfflineSpeechToTextImplementation.android.cs(188,56): error CA1305: The behavior of 'int.ToString()' could vary based on the current user's locale settings. Replace this call in 'RecognitionSupportCallback.OnError(int)' with a call to 'int.ToString(IFormatProvider)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) F:\Maui\src\CommunityToolkit.Maui.Core\Essentials\Badge\BadgeImplementation.windows.cs(22,40): error CA1305: The behavior of 'uint.ToString()' could vary based on the current user's locale settings. Replace this call in 'BadgeImplementation.SetCount(uint)' with a call to 'uint.ToString(IFormatProvider)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305)

Build failed with 7 error(s) and 81 warning(s) in 3.8s

Expected Behavior

After that, turning on the CA1305 analyzer should not result in build errors.

Steps To Reproduce

Open the project's .editorconfig and temporarily add the following lines to the end:

# CA1305: Specify IFormatProvider
dotnet_diagnostic.CA1305.severity = error

Run dotnet build and observe that the build fails with errors.

Link to public reproduction project repository

https://github.com/stephenquan/Maui/tree/feature/stephenquan/ca1305

Environment

- .NET MAUI CommunityToolkit: 12.0.0
- OS: Windows 11
- .NET MAUI: 9.0.70

Anything else?

Review the CameraInfo.shared.cs, OfflineSpeechToTextImplementation.android.cs, and BadgeImplementation.windows.cs implementations, and determine if the IFormatProvider, such as the InvariantCulture, can be used.