Convert XAML Vector Graphic to PNG

<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"><Canvas.Background>  <DrawingBrush><DrawingBrush.Drawing><DrawingGroup>
  <DrawingGroup x:Name="DrawingLayer">
    <DrawingGroup.ClipGeometry>
      <RectangleGeometry Rect="0,0,507.946,507.946" />
    </DrawingGroup.ClipGeometry>
    <GeometryDrawing x:Name="path51">
      <GeometryDrawing.Brush>
        <SolidColorBrush Color="#FFA4C9EE" Opacity="0.7" Transform="1.89511,0,0,1.91236,-231.458,-247.971" />
      </GeometryDrawing.Brush>
      <GeometryDrawing.Geometry>
        <PathGeometry FillRule="Nonzero" Transform="1.89511,0,0,1.91236,-231.458,-247.971" Figures="M134.757,263.776C134.757,330.515 189.055,384.816 255.796,384.816 322.535,384.816 376.835,330.515 376.835,263.776 376.835,197.035 322.535,142.737 255.796,142.737 189.055,142.737 134.757,197.035 134.757,263.776z" />
      </GeometryDrawing.Geometry>
    </GeometryDrawing>
    <GeometryDrawing x:Name="path56">
      <GeometryDrawing.Brush>
        <RadialGradientBrush Center="218.9404,219.7715" RadiusX="150.7063" RadiusY="150.7063" GradientOrigin="218.9404,219.7715" MappingMode="Absolute" Opacity="1" Transform="2.04451,0,0,2.04451,-264.353,-281.723">
          <GradientStop Color="#FF73FFFF" Offset="0" />
          <GradientStop Color="#FF2EA6B9" Offset="0.2809" />
          <GradientStop Color="#FF006B8B" Offset="1" />
        </RadialGradientBrush>
      </GeometryDrawing.Brush>
      <GeometryDrawing.Pen>
        <Pen Thickness="7.73106" StartLineCap="Flat" EndLineCap="Flat" LineJoin="Miter">
          <Pen.Brush>
            <SolidColorBrush Color="#FF1C6671" Opacity="0.988235" />
          </Pen.Brush>
        </Pen>
      </GeometryDrawing.Pen>
      <GeometryDrawing.Geometry>
        <PathGeometry FillRule="EvenOdd" Transform="2.04451,0,0,2.04451,-264.353,-281.723" Figures="M356.643,263.366C356.643,320.393 310.413,366.623 253.387,366.623 196.36,366.623 150.131,320.394 150.131,263.366 150.131,206.339 196.36,160.11 253.387,160.11 310.412,160.11 356.643,206.339 356.643,263.366z" />
      </GeometryDrawing.Geometry>
    </GeometryDrawing>
    <GeometryDrawing x:Name="path249">
      <GeometryDrawing.Brush>
        <SolidColorBrush Color="#FFFFFFFF" Opacity="0.99" Transform="22.3548,0,0,22.3548,-5265.87,-2768.46" />
      </GeometryDrawing.Brush>
      <GeometryDrawing.Pen>
        <Pen Thickness="0.532547" StartLineCap="Flat" EndLineCap="Flat" LineJoin="Miter">
          <Pen.Brush>
            <SolidColorBrush Color="#FF0C6772" Opacity="0.988235" />
          </Pen.Brush>
        </Pen>
      </GeometryDrawing.Pen>
      <GeometryDrawing.Geometry>
        <PathGeometry FillRule="Nonzero" Transform="22.3548,0,0,22.3548,-5265.87,-2768.46" Figures="M243.23,133.176C243.14,130.512 244.49,129.072 247.28,129.072 249.656,129.072 251.186,130.314 251.186,132.33 251.186,133.554 250.772,134.346 249.332,135.552 248.108,136.578 247.784,137.136 247.803,137.946L247.803,138.324 246.489,138.324C246.363,137.262 246.634,136.308 247.3,135.606 249.064,133.716 249.621,133.374 249.621,132.402 249.621,131.268 248.758,130.368 247.264,130.368 245.626,130.368 244.726,131.286 244.798,133.176L243.232,133.176z M246.236,141.978L246.236,140.016 248.018,140.016 248.018,141.978 246.236,141.978z" />
      </GeometryDrawing.Geometry>
    </GeometryDrawing>
  </DrawingGroup>
      </DrawingGroup></DrawingBrush.Drawing></DrawingBrush></Canvas.Background></Canvas>