C # "no flag can be set" is reported when file security attributes are modified"

 

This problem occurs:

The cause of this error is:

OriginalCode:

 
VoidModifyfilesecurityinfo (StringFilename,StringUsername) {system. Io. fileinfo=NewFileinfo (filename); filesecurity FS=Fileinfo. getaccesscontrol (); FS. addaccessrule (NewFilesystemaccessrule (username, filesystemrights. Modify, inheritanceflags. containerinherit |Inheritanceflags. objectinherit, propagationflags. None, accesscontroltype. Allow); fileinfo. setaccesscontrol (FS );}
 

Modified code:

 
VoidModifyfilesecurityinfo (StringFilename,StringUsername) {system. Io. fileinfo=NewFileinfo (filename); filesecurity FS=Fileinfo. getaccesscontrol (); FS. addaccessrule (NewFilesystemaccessrule (username, filesystemrights. Modify, inheritanceflags. None, propagationflags. None, accesscontroltype. Allow); fileinfo. setaccesscontrol (FS );}
 

The description of inheritanceflags is to specify the inheritance semantics of the access control item (ACE.

There are three enumerations:

None sub-object does not inherit ace

Containerinherit is inherited by container sub-objects. I understand it as "folder". You can specify this flag.

objectinherit is inherited by the slave object. I understand it as a "File". You can specify this flag.