title: Issues on Microsoft.BotFramework + LUIS + .Net Core 2.0
body: <p>I had implemented a chatbot using Microsoft.BotFramework in a .Net Framework WebAPI and it's working, now I want do port it to .Net Core 2, to share some libraries, authentication ... with other projects.</p>
  
  <p>The big issue is that everytime I try to run it, when the message is passed to my "Dialog" class, my bot crashes giving me the following error:</p>
  
  <pre><code>Exception: Type ‘System.RuntimeType’ in Assembly ‘System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e’ is not marked as serializable.
  </code></pre>
  
  <p>I tried to find some solutions but couldn't find any.</p>