public static void WriteError(string errorMessage) { try { string path = "~/Log/" + System.DateTime.Today.ToString("yyMMdd") + ".txt"; if (!System.IO.File.Exists(HttpContext.Current.Server.MapPath(path))) { System.IO.File.Create(HttpContext.Current.Server.MapPath(path)).Close(); } using (System.IO.StreamWriter streamWriter = System.IO.File.AppendText(HttpContext.Current.Server.MapPath(path))) { streamWriter.WriteLine("\r\nLog Entry : "); streamWriter.WriteLine("{0}", System.DateTime.Now.ToString(System.Globalization.CultureInfo.InvariantCulture)); streamWriter.WriteLine(errorMessage); streamWriter.WriteLine("________________________________________________________"); streamWriter.Flush(); streamWriter.Close(); } } catch (System.Exception ex) { NetLog.WriteError(ex.Message); } }