title: How to submit a multipart/form-data HTTP POST request from C#
body: <p>What is the easiest way to submit an HTTP POST request with a multipart/form-data content type from C#?  There has to be a better way than building my own request.</p>
  
  <p>The reason I'm asking is to upload photos to Flickr using this api:</p>
  
  <p><a href="http://www.flickr.com/services/api/upload.api.html" rel="noreferrer">http://www.flickr.com/services/api/upload.api.html</a></p>