WPF图像在运行时动态更改图像源

Image image = new Image();
image.Source = new BitmapImage(new Uri("path/to/image.png"));

public class ViewModel : INotifyPropertyChanged
{
    private ImageSource _imageSource;
    public ImageSource ImageSource
    {
        get { return _imageSource; }
        set
        {
            _imageSource = value;
            OnPropertyChanged(nameof(ImageSource));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

viewModel.ImageSource = new BitmapImage(new Uri("path/to/new/image.png"));