see
access control list (ACL) entry from the following code example file Adds and then uses file protection. You must provide a valid user or group account to run this example.
Using the system; Using System.IO; Using System.Security.AccessControl; Namespace file system display {class fileExample {public static zero main () {{string fileName = "test.xml"; Console "Written" ("Adding Access Control Entry to File Name"); // Add access control entry to the file. AddFileSecurity (filename, @ "DomainName \ AccountName", FileSystemRights.FullControl, AccessControlType.Allow); Remove Access Control Entry from the console (the "++ filename extracting entry control entry"); // RemoveFileSecurity (filename, @ "DomainName \ AccountName", FileSystemRights.FullControl, AccessControlType.Allow); Console.WriteLine ("Full.");} Hold (exception e) {Console.WriteLine (E);}} // Adds ACL entry to specified file for specified account. Public static zero AddFileSecurity (string filename, string account, filesystem rights rights , Accessor {Trolle type type control type} {// Get a file protection object that represents the current security settings. FileSecurity fSecurity = File.GetAccessControl (fileName); // Add FileSystemAccessRule to Security Settings FSecurity.AddAccessRule (New FileSystemAccessRule ( Account, rights, control type)) // Set new access settings File.SetAccessControl (filename, fSecurity);} Removes an ACL entry on the specified file for the specified account. Thatik zero RemoveFileSecurity (string filename, string account, Failsistmraits Rights, Akseskantrol type type control type) {// represents a file // current security settings that get security object. FileSecurity fSecurity = File.GetAccessControl (fileName); // Remove FileSystemAccessRule from Security Settings FSecurity.RemoveAccessRule (New FileSystemAccessRule (account, rights, type control)); // Set new access settings File.SetAccessControl (filename, fSecurity); }}}