[Csharp] Create Log file

Log file is always useful for developer to fix bug application after deploy. Here is a simply class Logger, but it's very useful.

   1:  using System;

   2:  using System.Diagnostics;

   3:  using System.IO;

   4:   

   5:  namespace HHPS.CreditEducation.Frameworks.Commons

   6:  {

   7:      public class Logger

   8:      {

   9:          public const string LOG_FILE_NAME = "log.txt";

  10:   

  11:          public static void Write(string message = null, Exception exception = null)

  12:          {

  13:              string content = Environment.NewLine + DateTime.Now + " " +

  14:                               new StackTrace().GetFrame(1).GetMethod() + Environment.NewLine;

  15:   

  16:              if (!string.IsNullOrEmpty(message))

  17:              {

  18:                  content += message + Environment.NewLine;

  19:              }

  20:   

  21:              if (exception != null)

  22:              {

  23:                  content += exception.Message + Environment.NewLine;

  24:                  content += exception.StackTrace + Environment.NewLine;

  25:              }

  26:   

  27:              File.AppendAllText(Path.Combine(Environment.CurrentDirectory, LOG_FILE_NAME), content);

  28:          }

  29:      }

  30:  }

Log file will write current date time and name of parent method call it by this code:

   1:              string content = Environment.NewLine + DateTime.Now + " " +

   2:                               new StackTrace().GetFrame(1).GetMethod() + Environment.NewLine;

With a exception, log file write exception message and exception stack trace, very helpful to find bug.
When we use it in other class, we call like this:

   1:              try

   2:              {

   3:              }

   4:              catch (Exception ex)

   5:              {

   6:                  Logger.Write(null, ex);

   7:              }

Enjoy it!