Save UserControl for tile

TileService.cs

        private async Task ToImage(UIElement element, string filename, double height, double width)
        {
            element.UpdateLayout();
            element.Measure(new Size(width, height));
            element.UpdateLayout();
            element.Arrange(new Rect { Height = height, Width = width });

            var bitmap = new WriteableBitmap((int)width, (int)height);
            bitmap.Render(element, null);
            bitmap.Invalidate();

            await SaveTheImage(bitmap, filename);

            GC.Collect();
        }

        private async Task SaveTheImage(WriteableBitmap bitmap, string filename)
        {
            using (var fileStream = await StorageService.CreateFileAsync(filename))
            {
                bitmap.SavePng(fileStream);
            }
        }