/// <summary>
        /// 关闭应用
        /// </summary>
        private void Close()
        {
            if (_wb != null)
            {
                COMHelper.ReleaseObject(_wb);
            }

            if (_isNewApp && _appCreatedTimeBegin != null && _appCreatedTimeEnd != null)
            {
                COMHelper.KillProcessByNameAndStartTime(Aim.Component.ThirdpartySupport.Application.MS_OFFICE_EXCEL_PROCESS_NAME,
                                                        _appCreatedTimeBegin.Value, _appCreatedTimeEnd.Value);
            }

            GC.Collect();
            GC.WaitForPendingFinalizers();
        }