Files are not deleting from Server by ASP.net website

Question

I have site hosted on IIS

Application is designed to delete folder on server once it is used.
it uses Directoryinfo class to delete unwanted folders.


we have two environments for development and Testing.

Application working as expected on development whereas when we deployed on Test environment it started fail to delete folders.

Test environment has same privileges as in development


What could be issue that application is not able to delete folders?