I have problem with deleting physical files on disk. I found that " C:\Development\csns\files" is ready only, will this be the cause?

I tried to change the folder permission both in command line and in Window, but no luck. Attached screen shot.

Please advice, Thank you.

Maybe you should tell us what you get when you try to delete a file.

My "files" folder is also part-readonly like yours, and my code can delete files correctly.