Here's another one:
string strFileName = "chart" + DateTime.Now.Hour.ToString("00") + DateTime.Now.Minute.ToString("00") + DateTime.Now.Second.ToString("00");string strSecure = strFileName.getSha512(iInformation.MyIProfile.idNO);
strFileName += strSecure.Left(12).Replace(@"", "").Replace("/", "");
strFileName += ".xls";