title: EF Add Existing Table Without Migration
body: <p>In EF, if I add a new entity which represents an existing table in the database I get an error stating I need to run a migration.</p>
  
  <p>Is there anyway to add an existing table to my context without needing to create a new migration?</p>
  
  <p>Seems pointless to have an empty migration like this...</p>
  
  <pre><code>public override void Up()
  {
  }
  
  public override void Down()
  {
  }
  </code></pre>
  
  <p>I'm guessing every time I add entites it compares it to a serialised version in __MigrationHistory's model column.</p>