Thoughts and knowledge exposed

Today I’ve got a question on how to get files that are associated with specific work item. The requirement behind that was to grab configuration, data and similar files that were associated to a specific change request, which was entered as a work item.
After quick binging and browsing of the Team Foundation Server SDK, I’ve got the sample below.

static void Main(string[] args)
{
    using (TeamFoundationServer tfs = TeamFoundationServerFactory.GetServer(args[0],
        new UICredentialsProvider()))
    {
        tfs.EnsureAuthenticated();
        WorkItemStore wiStore = (WorkItemStore)tfs.GetService(typeof(WorkItemStore));
        VersionControlServer vcs = (VersionControlServer)tfs.GetService(typeof(VersionControlServer));

        int workItemId;
        if (int.TryParse(args[1], out workItemId))
        {
            WorkItem workItem = wiStore.GetWorkItem(workItemId);
            Console.WriteLine("Work item: {0}", workItem.Title);
            //We look for links associated with work item
            foreach (Link link in workItem.Links)
            {
                ExternalLink extLink = link as ExternalLink;
                if (extLink != null)
                {
                    ArtifactId artifact = LinkingUtilities.DecodeUri(extLink.LinkedArtifactUri);
                    //For this example I grab Changeset directly
                    //however in the real scenario you could grab other related workitems
                    //and this way parse entire tree up to the changeset
                    if (String.Equals(artifact.ArtifactType, "Changeset", StringComparison.Ordinal))
                    {
                        // Convert the artifact URI to Changeset object.
                        Changeset cs = vcs.ArtifactProvider.GetChangeset(new Uri(extLink.LinkedArtifactUri));
                        foreach (Change change in cs.Changes)
                        {
                            //We want to download files only
                            if (change.Item.ItemType == ItemType.File)
                            {
                                RetrieveFile(change);
                            }
                        }
                    }
                }
            }
            Console.ReadLine();
        }
    }
}

private static void RetrieveFile(Change change)
{
    //Technically we should process the information
    //i.e. you should create separate folders according to the server location
    //to avoid the file overwriting
    //if folders are not present - those should be created
    string fileName = change.Item.ServerItem.Split('/').Last();
    Console.WriteLine("Item name: {0}. Last operation {1}", fileName, change.ChangeType);
    change.Item.DownloadFile(@"C:MyProjectsVS10SolutionGetWIFilesttt" + fileName);
}

Here go the credits: http://blogs.msdn.com/buckh/archive/2006/08/12/artifact_uri_to_changeset.aspx
A quick reminder to myself (and the others): TFS is VERY extensible. You can extend the processes, work items, reports, functionality, … just need the right tools