Teach you how to create a folder that cannot be deleted

Start---Run--cmd
Enter dos
Enter the disk where you want to create the file, for example, d-disk
Input
d:
Just enter the d drive
Then create the file, the format must be optimistic
Enter
md 123..\\
"123"On behalf of the file name, change it yourself Remember that the last two points and slashes can't be less
So you create a folder for "123..", you can see if you can't open it, you can't delete it.
Since there is Folder, you can use it, how do you use it?
Start---Run---cmd
start d:\\123..\\
Open it, then you can use it in this file Put something in the folder, and the view size is 0kb
Will it be?
The delete folder command is
rd 123..\\