Nullability of reference types in return type of 'Action<BitmapSource>? CameraService.OnFrameReady.get' doesn't match implicitly implemented member 'Action<BitmapSource> ICameraService.OnFrameReady.get' (possibly because of nullability attributes).

Nullability of reference types in return type of 'Task<T?> ApiService.DeleteAsync<T>(string endpoint)' doesn't match implicitly implemented member 'Task<T> IApiService.DeleteAsync<T>(string endpoint)'.

Nullability of reference types in return type of 'Task<T?> ApiService.PutAsync<T>(string endpoint, object data)' doesn't match implicitly implemented member 'Task<T> IApiService.PutAsync<T>(string endpoint, object data)'.

Nullability of reference types in return type of 'Task<T?> ApiService.PostAsync<T>(string endpoint, object data)' doesn't match implicitly implemented member 'Task<T> IApiService.PostAsync<T>(string endpoint, object data)'.

Nullability of reference types in return type of 'Task<T?> ApiService.GetAsync<T>(string endpoint)' doesn't match implicitly implemented member 'Task<T> IApiService.GetAsync<T>(string endpoint)'.

'ChartElement<SkiaSharpDrawingContext>' is obsolete: 'The generic argument was removed.'

Cannot convert null literal to non-nullable reference type.

Nullability of reference types in type of 'event EventHandler RelayCommand.CanExecuteChanged' doesn't match implicitly implemented member 'event EventHandler? ICommand.CanExecuteChanged'.

Nullability of reference types in type of parameter 'parameter' of 'void RelayCommand.Execute(object parameter)' doesn't match implicitly implemented member 'void ICommand.Execute(object? parameter)' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'parameter' of 'bool RelayCommand.CanExecute(object parameter)' doesn't match implicitly implemented member 'bool ICommand.CanExecute(object? parameter)' (possibly because of nullability attributes).