C#秒转换小时

#region 秒转换小时 SecondToHour
/// <summary>
/// 秒转换小时
/// </summary>
/// <param name="time"></param>
/// <returns></returns>
public static string SecondToHour(double time)
{
string str = "";
int hour = 0;
int minute = 0;
int second = 0;
second = Convert.ToInt32(time);

if (second > 60)
{
minute = second / 60;
second = second % 60;
}
if (minute > 60)
{
hour = minute / 60;
minute = minute % 60;
}
return (hour + "小时" + minute + "分钟"
+ second + "秒");
}
#endregion