private void LogFile(String str)
{
// Create a writer and open the file:
///string logfile = WebConfigurationManager.AppSettings["SystemLog"].ToString() ;
StreamWriter log;
if (!File.Exists("logfile.txt"))
{
log = new StreamWriter("logfile.txt");
}
else
{
log = File.AppendText("logfile.txt");
}
// Write to the file:
log.WriteLine(DateTime.Now);
log.WriteLine(str);
log.WriteLine();
// Close the stream:
log.Close();
//end of write
}