'FileDialogFilter' is obsolete: 'Use Window.StorageProvider API or TopLevel.StorageProvider API'

Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

The variable 'ex' is declared but never used

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

Possible null reference assignment.

Possible null reference assignment.

Non-nullable field '_darkMode' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.