/// <summary>
        ///为文件夹添加users，everyone用户组的完全控制权限
        /// </summary>
        /// <param name=”dirPath”></param>
        static void AddSecurityControll2Folder(string dirPath)
        {
            //获取文件夹信息
            DirectoryInfo dir = new DirectoryInfo(dirPath);
            //获得该文件夹的所有访问权限
            System.Security.AccessControl.DirectorySecurity dirSecurity = dir.GetAccessControl(AccessControlSections.All);
            //设定文件ACL继承
            InheritanceFlags inherits = InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit;
            //添加ereryone用户组的访问权限规则 完全控制权限
            FileSystemAccessRule everyoneFileSystemAccessRule = new FileSystemAccessRule(“Everyone”, FileSystemRights.FullControl, inherits, PropagationFlags.None, AccessControlType.Allow);
            //添加Users用户组的访问权限规则 完全控制权限
            FileSystemAccessRule usersFileSystemAccessRule = new FileSystemAccessRule(“Users”, FileSystemRights.FullControl, inherits, PropagationFlags.None, AccessControlType.Allow);
            bool isModified = false;
            dirSecurity.ModifyAccessRule(AccessControlModification.Add, everyoneFileSystemAccessRule, out isModified);
            dirSecurity.ModifyAccessRule(AccessControlModification.Add, usersFileSystemAccessRule, out isModified);
            //设置访问权限
            dir.SetAccessControl(dirSecurity);
        }

==================================

/// <summary>
        /// 为文件添加users，everyone用户组的完全控制权限
        /// </summary>
        /// <param name=”filePath”></param>
        static void AddSecurityControll2File(string filePath)
        {

            //获取文件信息
            FileInfo fileInfo = new FileInfo(filePath);
            //获得该文件的访问权限
            System.Security.AccessControl.FileSecurity fileSecurity = fileInfo.GetAccessControl();
            //添加ereryone用户组的访问权限规则 完全控制权限
            fileSecurity.AddAccessRule(new FileSystemAccessRule(“Everyone”, FileSystemRights.FullControl, AccessControlType.Allow));
            //添加Users用户组的访问权限规则 完全控制权限
            fileSecurity.AddAccessRule(new FileSystemAccessRule(“Users”, FileSystemRights.FullControl, AccessControlType.Allow));
            //设置访问权限
            fileInfo.SetAccessControl(fileSecurity);
        }