title: Web api return only some fields
body: <p>Following api function returns PartnerApiModel object, which is good.</p>
  <pre><code>[HttpGet]
  public HttpResponseMessage Get()
  {
     PartnerAPIModel apiPartner = new PartnerAPIModel();
     apiPartner.PublicId = &quot;1&quot;;
     apiPartner.DisplayName = &quot;Show this&quot;;
     apiPartner.Name = &quot;Test&quot;;
  
     return Request.CreateResponse(HttpStatusCode.OK, apiPartner);
  }
  </code></pre>
  <p>The result:</p>
  <pre><code>{
      &quot;PublicId&quot;: &quot;7eda5b39-7ef8-ea29-6136-37701e05b0cc&quot;,
      &quot;DisplayName&quot;: &quot;Show this&quot;,
      &quot;Name&quot;: &quot;Test&quot;,
  }
  </code></pre>
  <p>Is it possible to return only following?</p>
  <pre><code>{
      &quot;PublicId&quot;: &quot;7eda5b39-7ef8-ea29-6136-37701e05b0cc&quot;,
      &quot;DisplayName&quot;: &quot;Show this&quot;,
  }
  </code></pre>