求解C#编程题

using System;
using System.Timers;

class TestTimer
{
public static void Main()
{
Timer timer = new Timer();
timer.Elapsed += new ElapsedEventHandler( DisplayTimeEvent );
timer.Interval = 1000;
timer.Start();
timer.Enabled = true;

while ( Console.Read() != 'q' )
{
//-------------
}
}
public static void DisplayTimeEvent( object source, ElapsedEventArgs e )
{
Console.Write(\r{0}, DateTime.Now);
}
}

public class Timer
{
int hour;
public int Hour
{
get { return hour; }
set { hour = value; }
}
int minute;
public int Minute
{
get { return minute; }
set { minute = value; }
}
int second;
public int Second
{
get { return second; }
set { second = value; }
}
public DateTime Calculate(DateTime DateTime,TimeSpan TimeSpan,string s)
{
DateTime d = new DateTime();
if (s == "+") d = DateTime + TimeSpan;
if (s == "-") d = DateTime - TimeSpan;
return d;
}
}