Nant task to calculate GMT or UTC timestamp

I was surprised when i realized that standard implementation of <tstamp> task do not support getting time in GMT time zone. I have not found any custom extensions for nant, which will provide such functionality so i was forced to write my own custom task. Fortunately it is really easy:

    <script language="C#" prefix="test" >
 <code>
   <![CDATA[
  [TaskName("gmttimestamp")]
  public class gmttimestamp : Task
  {
   private string _pattern;
   private string _property;

   [TaskAttribute("pattern", Required = true)]
   public string Pattern
   {
    get { return _pattern; }
    set { _pattern = value; }
   }

   [TaskAttribute("property", Required = true)]
   public string Property
   {
    get { return _property; }
    set { _property = value; }
   }

   protected override void ExecuteTask()
   {
    string gmtTime = DateTime.UtcNow.ToString(_pattern);
    Properties.Add(_property, gmtTime);

    Log(Level.Info, "[gmttimestamp] :" + gmtTime);
   }
  }
   ]]>
 </code>
   </script>

Usage in Nant build script:

 <gmttimestamp property='today' pattern="yyMMdd"/>
 <gmttimestamp property='start.selenium.timestamp' pattern="HH:mm:ss"/>

Fully integrated task can be found here: http://code.google.com/p/design-of-selenium-tests-for-asp-net/source/browse/trunk/_build/scripts/continuous/main.build