TFS-SDK：合并不起作用

作为更大实现的一部分，我尝试使用 TFS-SDK 实现源代码控制分支/文件夹的合并操作。我正在针对 TFS2010 安装进行工作。
我所拥有的是这样的：

using System;
using Microsoft.TeamFoundation.Client;
using Microsoft.TeamFoundation.VersionControl.Client;
using Microsoft.TeamFoundation.VersionControl.Common;

namespace MergeBranchesFolders
{
    class Program
    {
        static void Main()
        {
            TfsTeamProjectCollection teamProjectCollection = TfsTeamProjectCollectionFactory.GetTeamProjectCollection(new Uri("http://TFSSERVER/Collection"));
            var versionControl = teamProjectCollection.GetService<VersionControlServer>();

            const string fromPath = "$/TeamProject/SourceDir";
            const string toPath = "$/TeamProject/TargetDir";

            Workspace myWorkspace = versionControl.GetWorkspace("WorkspaceName", "WorkspaceOwner");
            GetStatus getStatus = myWorkspace.Merge(fromPath, toPath, VersionSpec.Latest, VersionSpec.Latest,
                                                    LockLevel.None, RecursionType.Full, MergeOptionsEx.None);
        }
    }
}

I'm convinced that I get proper access to myWorkspace, yet the getStatus looks like this:


That pretty much says that nothing has happened.

Yet if I try to merge in the IDE, I get several merge candidates.
The same merge candidates are also visible if I do a:

var mergeCandidates = versionControl.GetMergeCandidates(fromPath, toPath,RecursionType.Full).ToList();

我都失败了fromPath/toPath是分支和文件夹 - 即使是单个文件。
我能找到的唯一资源是this http://social.msdn.microsoft.com/forums/en-US/tfsversioncontrol/thread/5c0dedfa-8c4d-4fc6-bf78-23d20a2a4db0一个，这没有帮助......

谢·雷腾的博客文章 http://blogs.microsoft.co.il/blogs/shair/archive/2009/04/20/tfs-api-part-19-merge.aspx来救援！

这失败了：

GetStatus getStatus = myWorkspace.Merge(fromPath, toPath, VersionSpec.Latest, VersionSpec.Latest,
                                                    LockLevel.None, RecursionType.Full, MergeOptionsEx.None);

这成功了：

GetStatus getStatus = myWorkspace.Merge(fromPath, toPath, null, null, LockLevel.None, RecursionType.Full, MergeOptionsEx.None);