使用查询的C#计算时间

// 获取当前日期和时间
DateTime now = DateTime.Now;

// 加上一小时
DateTime oneHourLater = now.AddHours(1);

// 减去一天
DateTime oneDayEarlier = now.AddDays(-1);

// 比较两个日期
bool isSameDate = now.Date == oneHourLater.Date;

// 获取日期的部分
int year = now.Year;
int month = now.Month;
int day = now.Day;
int hour = now.Hour;
int minute = now.Minute;
int second = now.Second;

// 输出结果
Console.WriteLine("当前时间：" + now);
Console.WriteLine("一小时后：" + oneHourLater);
Console.WriteLine("一天前：" + oneDayEarlier);
Console.WriteLine("是否为同一天：" + isSameDate);
Console.WriteLine("年：" + year);
Console.WriteLine("月：" + month);
Console.WriteLine("日：" + day);
Console.WriteLine("时：" + hour);
Console.WriteLine("分：" + minute);
Console.WriteLine("秒：" + second);