title: Silverlight Dataform: "Save" and "Edit" buttons not showing up
body: <p>I'm trying to make a data form in Silverlight 4. Perhaps I'm doing something wrong.</p>
  
  <p>The class:</p>
  
  <pre><code>public class ExpenseInfoTest
  {
      public int MyProperty { get; set; }
      public int Foo { get; set; }
      public int Bar { get; set; }
  }
  </code></pre>
  
  <p>XAML:</p>
  
  <pre><code>    &lt;local:ExpenseInfoTest x:Key="newExpense"/&gt;
  
      &lt;df:DataForm Height="218" 
                   HorizontalAlignment="Left" 
                   Margin="13,368,0,0" 
                   Name="expenseDataForm" 
                   VerticalAlignment="Top" 
                   Width="590" 
                   CurrentItem="{StaticResource newExpense}" /&gt;
  </code></pre>
  
  <p>What is displayed:
  <img src="https://i.stack.imgur.com/we1ad.png" alt="Just the fields without the save and edit buttons"></p>
  
  <p>I'd like the "Save" button. How can I get it to appear? Is something wrong in my XAML or data class?</p>