title: WCF not exposing fields but uses ExtensionData
body: <p>Im trying to create a WCF which consumes a List</p>
  
  <pre><code>  public class myClass { 
         public int ID { get;set;}
    }
  </code></pre>
  
  <p>In my service i write </p>
  
  <pre><code>    [DataContract]
      public class myClass
      {
          public int ID { get; set; }
      }
  </code></pre>
  
  <p>And my client nows the entity</p>
  
  <pre><code>   ServiceReference2.myClass[] sendData = new ServiceReference2.myClass[2];
  </code></pre>
  
  <p>but when i would add a new myClass to the array like </p>
  
  <pre><code>   ServiceReference2.myClass add1= new ServiceReference2.myClass();
  </code></pre>
  
  <p>the entity only exposes the field 'ExtensionData' and not the field ID</p>
  
  <p>What am i doing wrong</p>