title: EF 6 How to skip existing tables when generating migrations
body: <p>I am trying to use code-first within my existing project. I want to exclude existing entities from migrations I generate for new entities.</p>
  
  <p>I have all models in separate class library project e.g. Data.Models and I am intending to use one context by creating another class library e.g. Infra.EF (model project is referenced in it).</p>
  
  <p>This is how my DbContext looks like:</p>
  
  <pre><code>    public DbSet&lt;ExistingEntityOne&gt; DataOfEntityOne { get; set; }
      public DbSet&lt;ExistingEntityTwo&gt; DataofEntityTwo { get; set; }
      public DbSet&lt;NewEntity&gt; NewData { get; set; }
  </code></pre>
  
  <p>Sorry if question isn't clear but I can add more information based on your feedback.</p>
  
  <p>Thanks.</p>