将秒转换为（小时：分钟：秒：秒：秒）时间的最佳方法是什么？

对于 .Net <= 4.0，请使用TimeSpan类。

TimeSpan t = TimeSpan.FromSeconds( secs );string answer = string.Format("{0:D2}h:{1:D2}m:{2:D2}s:{3:D3}ms",      t.Hours,      t.Minutes,      t.Seconds,      t.Milliseconds);

（如Inder Kumar Rathore所述）对于 .NET > 4.0，您可以使用

TimeSpan time = TimeSpan.FromSeconds(seconds);//here backslash is must to tell that colon is//not the part of format, it just a character that we want in outputstring str = time .ToString(@"hh:mm:ss:fff");

（摘自Nick Molyneux）确保秒数小于

TimeSpan.MaxValue.TotalSeconds