public static void ErrorLog(string mssg)

        {

            string FilePath = "D:/logs/ErrorLog.txt";

            try

            {

                if (System.IO.File.Exists(FilePath))

                {

                    using (StreamWriter tw = System.IO.File.AppendText(FilePath))

                    {

                        tw.WriteLine(DateTime.Now.ToString() + "> " + mssg);

                    }  //END using

                }  //END if

                else

                {

                    StreamWriter tw = new StreamWriter(FilePath);

                    tw.WriteLine(DateTime.Now.ToString() + "> " + mssg);

                    tw.Flush();

                    tw.Close();

                    tw = null;

                }  //END else

            }  //END Try

            catch (Exception ex)

            { } //END Catch   

        }  // END ErrorLog