title: Design-Time validation of library
body: <p>I have a library that I would like to license and distribute.</p>
  
  <p>I know how to license a class/library for runtime. I've done that several times, actually. I know how to license a user control. I've also done that several times. </p>
  
  <p>What's got me stumped is how to license a library (that has no drag/drop user control or component) for development only. How do you license a library for design-time?</p>
  
  <p>Any thoughts/hints?</p>