title: Setting default dateTime value in EF Core
body: <p>So the problem is that I can't set the model so that the migration will show <code>DateTimeKind.Utc</code> instead of <code>DateTimeKind.Unspecified</code> 
  I'm doing this:</p>
  
  <pre><code>contactsConfiguration
     .Property(c =&gt; c.DateAdded)
     .ValueGeneratedOnAdd()
     .HasConversion(v =&gt; v, v =&gt; DateTime.SpecifyKind(v, DateTimeKind.Utc))
  </code></pre>
  
  <p>Any ideas?</p>