protected LogWriter logWriter;

bool dirExists = validateDir();  // Create directory if not exist

if (dirExists) {

   bool fileExists = validateFile();  // Create file if not found

   if (fileExists) {
      StreamWriter sw = new StreamWriter(file, true, System.Text.Encoding.ASCII);

      logWriter = new LogWriter(sw);
      logWriter.log("Test1");
   }
}


// Class LogWriter
public class LogWriter {
   private TextWriter tw;

   public LogWriter(TextWriter tw) {
      this.tw = tw;
   }

   public void log (string message) {
      tw.WriteLine("[{0} : {1}] =>", DateTime.Now.ToLongDateString(), DateTime.Now.ToLongTimeString());
      tw.WriteLine("{0}", message);
      tw.WriteLine("\n");
      tw.Flush();
      tw.Close();
   }
}

// End Class LogWriter