private void HandleInnerException()
{   
   string timeZoneName = "Any Standard Time";
   TimeZoneInfo tz;
   try
   {
      tz = RetrieveTimeZone(timeZoneName);
      Console.WriteLine("The time zone display name is {0}.", tz.DisplayName);
   }
   catch (TimeZoneNotFoundException e)
   {
      Console.WriteLine("{0} thrown by application", e.GetType().Name);
      Console.WriteLine("   Message: {0}", e.Message);
      if (e.InnerException != null)
      {
         Console.WriteLine("   Inner Exception Information:");
         Exception innerEx = e.InnerException;
         while (innerEx != null)
         {
            Console.WriteLine("      {0}: {1}", innerEx.GetType().Name, innerEx.Message);
            innerEx = innerEx.InnerException;
         }
      }            
   }   
}

private TimeZoneInfo RetrieveTimeZone(string tzName)
{
   try
   {
      return TimeZoneInfo.FindSystemTimeZoneById(tzName);
   }   
   catch (TimeZoneNotFoundException ex1)
   {
      throw new TimeZoneNotFoundException( 
            String.Format("The time zone '{0}' cannot be found.", tzName), 
            ex1);
   }          
   catch (InvalidTimeZoneException ex2)
   {
      throw new InvalidTimeZoneException( 
            String.Format("The time zone {0} contains invalid data.", tzName), 
            ex2); 
   }      
}