title: email hyperlinkbutton
body: <p>I'm trying to use a hyperlink button as a mailto in silverlight 4 like so:</p>
  
  <pre><code>&lt;HyperlinkButton x:Name="hlbCustomerSupport" NavigateUri="mailto:customerservice@fofo.com" Content="customerservice@fofo.com"&gt;&lt;/HyperlinkButton&gt;
  </code></pre>
  
  <p>and when I click it in the application I get:</p>
  
  <blockquote>
    <p>Webpage error details</p>
    
    <p>User Agent: Mozilla/4.0 (compatible;
    MSIE 8.0; Windows NT 6.1; Trident/4.0;
    SLCC2; .NET CLR 2.0.50727; .NET CLR
    3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C;
    .NET4.0E) Timestamp: Wed, 19 Jan 2011
    14:24:29 UTC</p>
    
    <p>Message: Unhandled Error in
    Silverlight Application  Code: 4004<br>
    Category: ManagedRuntimeError<br>
    Message: System.ArgumentException:
    Content for the URI cannot be loaded.
    The URI may be invalid. Parameter
    name: uri    at
    System.Windows.Navigation.NavigationService.NavigateCore(Uri
    uri, NavigationMode mode, Boolean
    suppressJournalAdd, Boolean
    isRedirect)    at
    System.Windows.Controls.Frame.Navigate(Uri
    source)    at
    MS.Internal.NavigationHelper.TryInternalNavigate()
    at
    MS.Internal.NavigationHelper.Navigate(Boolean
    checkUserInitiatedAction)    at
    System.Windows.Controls.HyperlinkButton.OnClick()
    at
    System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs
    e)    at
    System.Windows.Controls.Control.OnMouseLeftButtonUp(Control
    ctrl, EventArgs e)    at
    MS.Internal.JoltHelper.FireEvent(IntPtr
    unmanagedObj, IntPtr unmanagedObjArgs,
    Int32 argsTypeIndex, String eventName)</p>
  </blockquote>
  
  <p>I do this programatically elsewhere and it works.  I tried the same approach for this one and still get the error.</p>