关于TimeSpan

一秒是1000万个tick

TimeSpan ts = new TimeSpan(1000 * 10000);
Console.WriteLine(ts);
Console.Read();
//print 00:00:01

并且在TimeSpan的类里都有常量定义

public const long TicksPerDay = 864000000000;

public const long TicksPerHour = 36000000000;

public const long TicksPerMillisecond = 10000;

public const long TicksPerMinute = 600000000;

public const long TicksPerSecond = 10000000;