C# 展望 ;创建文件夹后无法移动电子邮件

我的应用程序应该向某个目的地发送一些电子邮件。在该操作之后，我想自动将已发送的邮件移动到特定文件夹（基于邮件附件中的文档类型）。如果文件夹不存在，则程序必须创建它，然后将邮件移动到新创建的文件夹。问题是，在我创建一个新文件夹并首次成功将邮件移动到该文件夹后，当我发送另一封应该移动到该文件夹的邮件时，程序看不到该文件夹。事实上，文件夹方法根本不返回任何文件夹。坦率地说，我不知道有什么问题。

签入调试器时，它说 parentFolder.Folder "枚举未产生任何结果"

我不确定在方法创建文件夹后是否应该做更多的事情（即，更新文件夹列表...

这是我的代码：

    public void moveEmails(string itemType, Boolean itemSent, Outlook.MailItem objMail)
    {
        Outlook.MAPIFolder folderParent = objMail.Parent as Outlook.MAPIFolder;
        Outlook.Folders folders;
        Boolean notMoved = true;
        objMail.UserProperties.Add("TransferredBy", Outlook.OlUserPropertyType.olText, true, Outlook.OlUserPropertyType.olText);
        objMail.UserProperties["TransferredBy"].Value = System.Security.Principal.WindowsIdentity.GetCurrent().Name;
        objMail.Save();

        if (folderParent.Name != "Inbox")
            folderParent = digForInbox(folderParent);
        folders = folderParent.Folders;
        if (!itemSent)
            itemType = "NOT DELIVERED";
        foreach (Outlook.MAPIFolder folder in folders)
        {
            if (folder.Name == itemType)
            {
                objMail.Move(folder);
                notMoved = false;
            }
        }
        if (notMoved)
            createFolder(itemType,objMail, folderParent);
    }
    public void createFolder(string itemType, Outlook.MailItem objMail, Outlook.MAPIFolder folderParent)
    {
        Outlook.MAPIFolder folderNew;
        folderNew = folderParent.Folders.Add( itemType, Outlook.OlDefaultFolders.olFolderInbox ) as Outlook.MAPIFolder;
        objMail.Move(folderNew);
    }
    private Outlook.MAPIFolder digForInbox(Outlook.MAPIFolder folder)
    {
        Boolean isNotInbox = true;
        while(isNotInbox)
        {
            if(folder.Name != "Inbox")
            {
                folder = folder.Parent as Outlook.MAPIFolder;
            }
            else
            {
                isNotInbox = false;
            }
        }
        return folder;
    }