把秒转换成分钟/返回某年某月最后一天返回时间差

using System;
using System.Collections.Generic;
using System.Text;

namespace AIMSCommon
{
public class TimeParser
{
/// <summary>
/// 把秒转换成分钟
/// </summary>
/// <returns></returns>
public static int SecondToMinute(int Second)
{
decimal mm = (decimal)((decimal)Second / (decimal)60);
return Convert.ToInt32(Math.Ceiling(mm));
}

#region 返回某年某月最后一天
/// <summary>
/// 返回某年某月最后一天
/// </summary>
/// <param name="year">年份</param>
/// <param name="month">月份</param>
/// <returns>日</returns>
public static int GetMonthLastDate(int year, int month)
{
DateTime lastDay = new DateTime(year, month, new System.Globalization.GregorianCalendar().GetDaysInMonth(year, month));
int Day = lastDay.Day;
return Day;
}
#endregion

#region 返回时间差
public static 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();
TimeSpan ts = DateTime2 - DateTime1;
if (ts.Days >=1)
{
dateDiff = DateTime1.Month.ToString() + "月" + DateTime1.Day.ToString() + "日";
}
else
{
if (ts.Hours > 1)
{
dateDiff = ts.Hours.ToString() + "小时前";
}
else
{
dateDiff = ts.Minutes.ToString() + "分钟前";
}
}
}
catch
{ }
return dateDiff;
}
#endregion
}
}