C# 设置文件夹的访问权限

/// <summary>
        /// 设置文件夹的ACL
        /// </summary>
        /// <param name="folderPath">文件夹路径</param>
        /// <param name="userName">用户</param>
        /// <param name="rights">权限</param>
        /// <param name="allowOrDeny">拒绝访问</param>
        /// <returns></returns>
        public static bool SetFolderACL(
            string folderPath,
            string userName,
            FileSystemRights rights,
            AccessControlType allowOrDeny)
        {
            //设定文件ACL继承
            InheritanceFlags inherits = InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit;

            return SetFolderACL(folderPath, userName, rights, allowOrDeny, inherits, PropagationFlags.None, AccessControlModification.Add);

        }

        /// <summary>
        /// 设置文件夹的ACL
        /// </summary>
        /// <param name="folderPath">文件夹路径</param>
        /// <param name="userName">用户</param>
        /// <param name="rights">权限</param>
        /// <param name="allowOrDeny">拒绝访问</param>
        /// <param name="inherits">ACL继承</param>
        /// <param name="propagateToChildren">应用于子文件夹及子文件</param>
        /// <param name="addResetOrRemove">修改类型</param>
        /// <returns></returns>
        public static bool SetFolderACL(
            string folderPath,
            string userName,
            FileSystemRights rights,
            AccessControlType allowOrDeny,
            InheritanceFlags inherits,
            PropagationFlags propagateToChildren,
            AccessControlModification addResetOrRemove)
        {
            bool result;
            //获取目录信息
            var folder = new DirectoryInfo(folderPath);
            //获取当前文件夹ACL
            var dSecurity = folder.GetAccessControl(AccessControlSections.All);
            //设置新的ACL规则
            var accRule = new FileSystemAccessRule(userName, rights, inherits, propagateToChildren, allowOrDeny);
            //修改文件夹ACL
            dSecurity.ModifyAccessRule(addResetOrRemove, accRule, out result);
            //应用新的ACL规则到文件夹
            folder.SetAccessControl(dSecurity);
            //返回结果
            return result;

        }

下面这样调用

        var folderPath = System.AppDomain.CurrentDomain.BaseDirectory;
        var userName = "Users";
        SetFolderACL(folderPath, userName, FileSystemRights.FullControl, AccessControlType.Allow);