FileStream fs = new FileStream(System.AppDomain.CurrentDomain.BaseDirectory + "log.txt",FileMode.Append);                byte[] data1 = System.Text.Encoding.Default.GetBytes(eeee.Message);                byte[] data2 = System.Text.Encoding.Default.GetBytes(eeee.StackTrace);                fs.Write(data1,0,data1.Length);                fs.Write(data2, 0, data2.Length);                fs.Flush();                fs.Close();