title: EF CORE 2.1 HasConversion on all properties of type datetime
body: <p>I previously used DateTimeKindEntityMaterializerSource (<a href="https://github.com/aspnet/EntityFrameworkCore/issues/4711" rel="noreferrer">Git</a>) to convert all DateTime to UTC when reading entities because the default was unspecified.</p>
  
  <p>With EF core 2.1 the DateTimeKindEntityMaterializerSource no longer works but we can actually do this </p>
  
  <pre><code>         builder
          .Entity&lt;ESDataQuotation&gt;()
          .Property(e =&gt; e.CreatedDate)
          .HasConversion(v =&gt; v, v =&gt; DateTime.SpecifyKind(v, DateTimeKind.Utc));
  </code></pre>
  
  <p>However, I have many properties of DateTime and I would like if there is a way to make the conversion for all property of type DateTime.</p>