title: Write text to image with indexed pixel format
body: <p>I have monochrome TIFF files (1 bpp) that I would like to write text to.  When I load them into System.Drawing.Image, and try to instantiate a Graphics object from that image, I receive the error, "A Graphics object cannot be created from an image that has an indexed pixel format."  </p>
  
  <p>I can convert the images to a non-indexed format, such as JPEG, but then the resulting image size is very large.</p>
  
  <p>I would like to accomplish this while keeping the image size down.  How can I write text onto these images without converting them to another format?</p>