//设置只读
        public void SetReadOnly()
        {
            try
            {
                this._docApp.Application.ActiveDocument.Protect(
                    WdProtectionType.wdAllowOnlyComments, ref this._noReset, ref this._password,
                    ref this._optional, ref this._optional);
            }
            catch (Exception ex)
            {
                this.Quit();
                throw ex;
            }
        }