title: convert a class object into another class object and then combine
body: <p>Say that I have two models/classes.</p>
  
  <pre><code>public class Male
  {
      public int RunNumber { get; set; }
      public string Notes { get; set; }
      public DateTime thing {get ; set;}
  }
  
  public class Female
  {
      public int StopNumber { get; set; }
      public string Notes { get; set; }
      public DateTime? thing {get;set;}
  }
  </code></pre>
  
  <p>I want a <code>List&lt;People&gt;</code> by combining <code>List&lt;Male&gt;</code> and <code>List&lt;Female&gt;</code>.  Every time I look at LINQ, my brain doesn't cooperate with me.  I think it's concat I'm after.</p>