如果文件名中存在 #2 或 #3 或 #（任意数字），则跳过文件重命名对话

下面是我的代码，我成功地仅重命名 aa 文件夹中的文件，并在每个子文件夹中爬行并重命名整个 .png 文件。

我正在尝试添加自定义，如果文件名已经获得 #1 或 #5 或任何 #(number) 那么我希望对话跳过该文件并转到下一个文件

private void button1_Click(object sender, EventArgs e)
    {
        FolderBrowserDialog folderDlg = new FolderBrowserDialog();
        //folderDlg.ShowDialog();
        if (folderDlg.ShowDialog() != DialogResult.OK)
        {
            return;
        }

        // Has different framework dependend implementations 
        // in order to handle unauthorized access to subfolders
        RenameAllPngFiles(folderDlg.SelectedPath);
    }
    private void RenameAllPngFiles(string directoryPath)
    {
        RenameCurrentPng(directoryPath);
        foreach (var item in GetDirectoryInfos(directoryPath))
        {
            RenameCurrentPng(item.FullName);
        }
    }

    private void RenameCurrentPng(string directoryPath)
    {
        int fileNameSuffixCounter = 1;
        foreach (string originalFullFileName in Directory.EnumerateFiles(directoryPath, "*.png"))
        {
            // The new file name without path
            var newFileName = $"{System.IO.Path.GetFileNameWithoutExtension(originalFullFileName)}#{fileNameSuffixCounter++}{System.IO.Path.GetExtension(originalFullFileName)}";
            FileSystem.RenameFile(originalFullFileName, newFileName);
        }
    }

    private DirectoryInfo[] GetDirectoryInfos(string directoryPath)
    {
        DirectoryInfo di = new DirectoryInfo(directoryPath);
        DirectoryInfo[] directories = di.GetDirectories("*", System.IO.SearchOption.AllDirectories);
        return directories;
    }