我的这个导照片的程序，在照片文件夹复制的时候报错，请问怎么改？

```vb.net
        Dim dz_y As String = "e:\DCIM"
        Dim dz_x As String = "C:\Users\zlm21\Desktop\"
        Dim n_x As String = TextBox1.Text
        If IO.Directory.Exists(dz_y) Then
            Button1.Enabled = False
            Microsoft.VisualBasic.FileIO.FileSystem.CopyDirectory(dz_y, dz_x)
            Microsoft.VisualBasic.FileSystem.Rename("dz_x" + "DCIM", n_x)
            Button1.Enabled = True

错误代码如下：

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/868846860156192.jpg "#left")

Dim dz_x As String = "C:\Users\zlm21\Desktop"

目录的路径格式错误。

异常：
ArgumentException
ArgumentNullException
IO.DirectoryNotFoundException
10.10Exception
InvalidOperationException
10.PathTooLongException
NotSupportedException
Security.SecurityException
UnauthorizedAccessException
行 15
列42
字符 42