title: How to exclude specific types from serialization?
body: <p>I run <code>sgen</code> against my assembly with a metric ton of types. I want to exclude 2 types from serialization.  I don't seem to be able to find a way to do it.</p>
  
  <p>I see that <code>sgen</code> has a <code>/type</code> switch to specify a specific type, but nothing to exclude a specific type.</p>
  
  <p>Is there a way to exclude specific types from serialization?</p>