Exemplo de event handler para o TFS

TfsEventHandler.cs

// Reference: Microsoft.TeamFoundation
// Reference: Microsoft.TeamFoudnation.Client
// Reference: Microsoft.TeamFoundation.Common
// Reference: Microsoft.TeamFoundation.Framework.Server
// Reference: Microsoft.TeamFoundation.Server
// Reference: Microsoft.TeamFoundation.WorkItemTracking.Client
// Reference: Microsoft.TeamFoundation.WorkItemTracking.Server.Dataaccesslayer
// Reference: Microsoft.TeamFoundation.WorkItemTracking.Server.DataServices

// Copy resulting DLL to %PROGRAMFILES%\Microsoft Team Foundation Server 2010\Application Tier\Web Services\Bin\Plugins

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.TeamFoundation.Framework.Server;
using Microsoft.TeamFoundation.WorkItemTracking.Server;
using Microsoft.TeamFoundation.Client;
using Microsoft.TeamFoundation.WorkItemTracking.Client;
using System.Net;

namespace TfsEventHandler
{
    public class EventListener: ISubscriber
    {
        public string Name
        {
            get { return "Event Listener de Exemplo"; }
        }

        public SubscriberPriority Priority
        {
            get { return SubscriberPriority.Normal; }
        }

        public EventNotificationStatus ProcessEvent(TeamFoundationRequestContext requestContext, NotificationType notificationType, object notificationEventArgs, out int statusCode, out string statusMessage, out Microsoft.TeamFoundation.Common.ExceptionPropertyCollection properties)
        {
            WorkItemChangedEvent eventData = notificationEventArgs as WorkItemChangedEvent;

            statusCode = 0;
            statusMessage = string.Empty;
            properties = null;

            if (eventData == null)
            {
                return EventNotificationStatus.ActionPermitted;
            }

            var field = eventData.ChangedFields.StringFields.FirstOrDefault(fld => fld.ReferenceName == "System.State" && fld.NewValue == "Resolved" && fld.OldValue == "Closed");

            if (field == null)
            {
                return EventNotificationStatus.ActionPermitted;
            }

            TfsTeamProjectCollection tpc = new TfsTeamProjectCollection(new Uri("http://localhost:8080/tfs/defaultcollection"), new NetworkCredential("abuobe", "P2ssw0rd"));
            tpc.EnsureAuthenticated();

            WorkItemStore store = tpc.GetService<WorkItemStore>();
            var project = store.Projects[eventData.PortfolioProject];

            var wi = project.WorkItemTypes["Issue"].NewWorkItem();

            wi.Title = "Novo impedimento";
            wi.Save();

            return EventNotificationStatus.ActionPermitted;
        }

        public Type[] SubscribedTypes()
        {
            return new Type[] { typeof(WorkItemChangedEvent) } ;
        }
    }
}