title: System.Drawing objects unmanaged resource disposing
body: <p>I have the following code:</p>
  
  <pre><code>using System.Drawing;
  ...
  Graphics _graphics = Graphics.FromImage(...)
  ...
  public void Draw(Stream stream, Rectangle rect, Color color) {
      _graphics.FillRectangle(new SolidBrush(Color), 0, 0, Width, Height);
      _graphics.DrawImage(new Bitmap(stream), rect);
  }
  </code></pre>
  
  <p>Should I surround the drawImage with using on <code>new Bitmap(...)</code>? 
  Same question on the <code>new SolidBrush(...)</code></p>