从 TFS 下载工作项附件（文件已损坏）

我正在尝试创建 C# 代码，因此我可以自动从 Team Foundation Server 下载 BUGS 预定义查询的所有附件。该代码似乎工作得很好，但所有下载的文件都因意外原因而损坏，我无法查看它们。有人可以看一下代码并分享意见吗？非常感谢您的帮助！

static void Main()
        {
            // Connection to the Team Project Collection
            TfsTeamProjectCollection tpc = TfsTeamProjectCollectionFactory.GetTeamProjectCollection(
              new Uri("https://xxx.visualstudio.com/defaultcollection"));

            // Get a WorkItemStore object for the Team Project Collection.
            WorkItemStore workItemStore = new WorkItemStore(tpc);

            // Run a query.
            WorkItemCollection queryResults = workItemStore.Query(
              @"SELECT *
    FROM WorkItems
    WHERE [System.WorkItemType] = 'Bug'
    AND [Language] = 'xxx'
    AND [How Found] = 'xxx'
    AND [Assigned to] = 'xxx'
    ORDER BY [Changed Date] DESC");

            // Get a WebClient object to do the attachment download
            WebClient webClient = new WebClient()
            {
                UseDefaultCredentials = true
            };

            // Loop through each work item.
            foreach (WorkItem workItem in queryResults)
            {
                // Loop through each attachment in the work item.
                foreach (Attachment attachment in workItem.Attachments)
                {
                    // Construct a filename for the attachment
                    string filename = string.Format("C:\\TEST\\{0}_{1}", workItem.Fields["ID"].Value, attachment.Name);
                    // Download the attachment.
                    webClient.DownloadFile(attachment.Uri, filename);
                }
            }

这是由于 WebClient 未正确向 TFS 服务器进行身份验证所致。您可以使用以下方式代替使用 WebClient 下载文件WorkItemServer.DownloadFile()中的方法Microsoft.TeamFoundation.WorkItemTracking.Proxy下载文件。详细内容请参考下面的代码：

foreach (Attachment atm in workItem.Attachments)
            {
                WorkItemServer wise = tpc.GetService<WorkItemServer>();
                string file = wise.DownloadFile(atm.Id);
                File.Copy(file,"C:\\TEST\\" + atm.Name,true);

            }