setting ACE is very slow for folder which having many files

is very slow for folder with many files and subfolders. My folder has 35602 files and 648 subfolders and SetAccessControl method needs 30 minuteto remove a userfrom this folder.

userfrom the security tab of folder using following code.

= new DirectoryInfo(folderPath); DirectorySecurity fSecurity = dirInfo.GetAccessControl(AccessControlSections.All); fSecurity = CanonicalizeDacl(fSecurity);

.RemoveAccessRule(new FileSystemAccessRule(coworkerAccount, accessRight, AccessControlType.Allow));

.SetAccessControl(fSecurity);

timewhen the folder having many files.