C#:Active Directory:Check/Uncheck Password never expires

        public void SetPasswordNeverExpiresProperty(bool PasswordNeverExpires)
        {
            DirectoryEntry de = GetDirectoryObject(UserName);
            if (PasswordNeverExpires)
            {
                ActiveDirectoryHelper.SetProperty(de, "userAccountControl",
                                                  (int)de.Properties["userAccountControl"].Value | 0x10000);
            }
            else
            {
                ActiveDirectoryHelper.SetProperty(de, "userAccountControl",
                                                  (int)de.Properties["userAccountControl"].Value ^ 0x10000);
            }
            de.CommitChanges();
        }

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