//Namespaces used. Include at the top of your script

using System;
using System.Data;
using System.IO;
using System.Configuration;

public static void writeDataToFile(string Msg)
{

  StreamWriter sw = null;
  try
  {
    string path;

    path = "C:\\Temp\\"; //' Or from App.Config ConfigurationSettings.AppSettings["LogFolder"];

    if (path == null || path == "")
    {
      path = System.IO.Path.GetDirectoryName( 
      System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase );

      //this returns URI encoded file path, take out the file:\ part of it in front
      path = path.Replace("file:\\","");

      //do not write anything in the \bin directory, use its parent dir
      if (path.EndsWith("\\bin") || path.EndsWith("bin\\") )
        path = path.Substring(0, path.Length-4); 
    }

    string today = 
    DateTime.Now.Year.ToString().Substring(2,2) + 
    DateTime.Now.Month.ToString().PadLeft(2,'0') + 
    DateTime.Now.Day.ToString().PadLeft(2,'0');

    //string ASSEMBLY_NAME = System.Reflection.Assembly.GetExecutingAssembly().GetName().Name;
    string ASSEMBLY_NAME = System.Threading.Thread.CurrentThread.Name;

    string _logFile = path + "\\" + ASSEMBLY_NAME + "_Informational_"+today+".log";

    sw = File.AppendText(_logFile); 
    sw.WriteLine(DateTime.Now.ToString() + "MACHINE="+ System.Net.Dns.GetHostName()+"-> " + Msg);
    sw.Close();
  } 
  catch(Exception ex)
  {
    ex = ex;
  }
  finally
  {
   if (sw != null) sw.Close();
  }
}