public string[] GetScrumTeams(TeamFoundationServer tfs, string tfsProject)

{

  ArrayList teams = HttpRuntime.Cache["_scrum_TeamCache"] as ArrayList;

  if (teams == null)

  {

      teams = new ArrayList();

      WorkItemStore workItemStore = (WorkItemStore)tfs.GetService(typeof(WorkItemStore));

      XmlDocument doc = workItemStore.ExportGlobalLists();

      XmlNode node = doc.SelectSingleNode("//GLOBALLIST[@name='Teams - " + tfsProject + "']");

      if (node == null)

          return new string[] { };

      foreach (XmlNode listItem in node.ChildNodes)

      {

         teams.Add(listItem.Attributes["value"].Value);

      }

      HttpRuntime.Cache.Add("_scrum_TeamCache", teams, null, DateTime.Now.AddHours(1), Cache.NoSlidingExpiration, System.Web.Caching.CacheItemPriority.Default, null);

    }

    return (string[])teams.ToArray(typeof(string));

}