Directoy.Delete(path, true) ->IOException:目录不为空->Win7上不同的用户

在卸载时，我在试图删除目录时得到IOException。'目录不是空的'。我尝试了下面列出的不同方法，但都不起作用。留下的(不能删除的)文件有不同的所有者。可以删除的文件的所有者为'SYSTEM'。抛出异常的文件的所有者为"Administrators(PC_Name'Administrators)"系统"文件是由installshield安装程序(MSI)编写的，而其他文件是由我的应用程序编写的，由installshield启动并提升为管理员…

如何强制删除这个文件夹/文件?

    //http://stackoverflow.com/questions/329355/cannot-delete-directory-with-directory-deletepath-true
    public static bool DeleteDirectory(string target_dir)
    {
        bool result = false;
        string[] files = Directory.GetFiles(target_dir);
        string[] dirs = Directory.GetDirectories(target_dir);
        foreach (string file in files)
        {
            File.SetAttributes(file, FileAttributes.Normal);
            File.Delete(file);
        }
        foreach (string dir in dirs)
        {
            DeleteDirectory(dir);
        }
        Directory.Delete(target_dir, false);
        return result;
    }
    //http://stackoverflow.com/questions/611921/how-do-i-delete-a-directory-with-read-only-files-in-c
    private static void DeleteFileSystemInfo(FileSystemInfo fsi) 
    { 
        fsi.Attributes = FileAttributes.Normal; 
        var di = fsi as DirectoryInfo; 
        if (di != null) 
        { 
            foreach (var dirInfo in di.GetFileSystemInfos())             
                DeleteFileSystemInfo(dirInfo); } 
        fsi.Delete(); 
    }
    //http://stackoverflow.com/questions/611921/how-do-i-delete-a-directory-with-read-only-files-in-c
    public static void ForceDeleteDirectory(string path)
    {
        DirectoryInfo root;
        Stack<DirectoryInfo> fols;
        DirectoryInfo fol;
        fols = new Stack<DirectoryInfo>();
        root = new DirectoryInfo(path);
        fols.Push(root);
        while (fols.Count > 0)
        {
            fol = fols.Pop();
            fol.Attributes = fol.Attributes & ~(FileAttributes.Archive | FileAttributes.ReadOnly | FileAttributes.Hidden);
            foreach (DirectoryInfo d in fol.GetDirectories())
            {
                fols.Push(d);
            }
            foreach (FileInfo f in fol.GetFiles())
            {
                f.Attributes = f.Attributes & ~(FileAttributes.Archive | FileAttributes.ReadOnly | FileAttributes.Hidden);
                f.Delete();
            }
        }
        root.Delete(true);
    }

编辑:对不起，忘记了:

在给出问题的文件夹上，在安装时，我给'Users'帐户完全控制:

        System.Security.Principal.SecurityIdentifier sid = new System.Security.Principal.SecurityIdentifier(
            System.Security.Principal.WellKnownSidType.BuiltinUsersSid, null);
        System.Security.Principal.NTAccount acct = sid.Translate(typeof(System.Security.Principal.NTAccount))
            as System.Security.Principal.NTAccount;
        string usr = acct.ToString();
        DirectoryInfo info = new DirectoryInfo(dir);
        DirectorySecurity ds = info.GetAccessControl();
        ds.AddAccessRule(new FileSystemAccessRule(usr, FileSystemRights.FullControl, AccessControlType.Allow));
        ds.AddAccessRule(new FileSystemAccessRule(usr, FileSystemRights.FullControl,
            InheritanceFlags.ObjectInherit | InheritanceFlags.ContainerInherit, PropagationFlags.InheritOnly,
            AccessControlType.Allow));
        info.SetAccessControl(ds);