C#留言时间格式化

namespace test
{
  class Program
  {
    static void Main(string[] args)
    {
      DateTime now = DateTime.Now;
      DateTime time = Convert.ToDateTime( "2014-03-17 11:02:00");
      TimeSpan ts = now - time;
      if (time.Year == now.Year)
      {
        if (ts.Days < 1 && now.Day == time.Day)
        {
          if (ts.Hours < 1)
          {
            if (ts.Minutes < 1)
            {
              string s=ts.Seconds.ToString() + "秒前爱我别走给您留言";
              Console.WriteLine(s);
              Console.ReadLine();
              return;
            }
            string a = ts.Minutes.ToString() + "分钟前爱我别走给您留言";
             Console.WriteLine(a);
             Console.ReadLine();
             return;
          }
          string b = "今天 " + time.ToString("HH:mm") + "爱我别走给您留言";
          Console.WriteLine(b);
          Console.ReadLine();
          return;
        }
        Console.WriteLine(time.Month.ToString()+"月" + time.Day.ToString() +"日"+ time.Hour.ToString("#00")+"小时" + time.Minute.ToString("#00")+"分钟前"+"爱你的他给你留言了");
      }
      Console.ReadLine();
    }
  }
}

     private string DateDiff(DateTime DateTime1,DateTime DateTime2)
     {
       string dateDiff=null;
       try
       {
         TimeSpan ts1=new  TimeSpan(DateTime1.Ticks);
         TimeSpan ts2=new  TimeSpan(DateTime2.Ticks);
         TimeSpan ts=ts1.Subtract(ts2).Duration();
         dateDiff=ts.Days.ToString()+"天"
             +ts.Hours.ToString()+"小时"
             +ts.Minutes.ToString()+"分钟"
             +ts.Seconds.ToString()+"秒";
       }
       catch
       {
       }
       return dateDiff;
     }