[C#]Canvas to BitmapImage

public static class SBA
{       
    public static WriteableBitmap SaveAsWriteableBitmap(Canvas surface)
    {
        if (surface == null) return null;

        // Save current canvas transform
        Transform transform = surface.LayoutTransform;
        // reset current transform (in case it is scaled or rotated)
        surface.LayoutTransform = null;

        // Get the size of canvas
        Size size = new Size(surface.ActualWidth, surface.ActualHeight);
        // Measure and arrange the surface
        // VERY IMPORTANT
        surface.Measure(size);
        surface.Arrange(new Rect(size));

        // Get the size of canvas
        size = new Size(surface.ActualWidth, surface.ActualHeight);
        // Measure and arrange the surface
        // VERY IMPORTANT
        surface.Measure(size);
        surface.Arrange(new Rect(size));

        // Create a render bitmap and push the surface to it
        RenderTargetBitmap renderBitmap = new RenderTargetBitmap(
          (int)size.Width,
          (int)size.Height,
          96d,
          96d,
          PixelFormats.Pbgra32);
        renderBitmap.Render(surface);

        //Restore previously saved layout
        surface.LayoutTransform = transform;

        //create and return a new WriteableBitmap using the RenderTargetBitmap
        return new WriteableBitmap(renderBitmap);
    }

    public static BitmapImage WriteableBitmapToBitmapImage(WriteableBitmap wbm)
    {
        BitmapImage bmImage = new BitmapImage();
        using (MemoryStream stream = new MemoryStream())
        {
            PngBitmapEncoder encoder = new PngBitmapEncoder();
            encoder.Frames.Add(BitmapFrame.Create(wbm));
            encoder.Save(stream);
            bmImage.BeginInit();
            bmImage.CacheOption = BitmapCacheOption.OnLoad;
            bmImage.StreamSource = stream;
            bmImage.EndInit();
            bmImage.Freeze();
        }
        return bmImage;
    }

    public static BitmapImage CanvasToBitmap(Canvas c)
    {
        return WriteableBitmapToBitmapImage(SaveAsWriteableBitmap(c));
    }

}

https://stackoverflow.com/questions/19098089/convert-canvas-to-bitmapimage-crop-to-path

Convert Canvas to BitMapImage & crop to path