C#时间戳与时间相互转换

代码：

using System;
 System.Collections.Generic;
 System.Linq;
 System.Text;
 System.Threading.Tasks;

namespace DataSync.Utils
{
    /// <summary>
    /// 时间工具类
    </summary>
    public class DateTimeUtil
    {
        private static DateTime _dtStart = new DateTime(1970,1,1)">8,1)">0,1)">0);

        <summary> 
         获取时间戳 
        </summary>  
        static string GetTimeStamp(DateTime dateTime)
        {
            return Convert.ToInt64(dateTime.Subtract(_dtStart).TotalMilliseconds).ToString();
        }

         根据时间戳获取时间 
        static DateTime TimeStampToDateTime( timeStamp)
        {
             _dtStart.AddMilliseconds(Convert.ToInt64(timeStamp));
        }

        longif (timeStamp > )
            {
                 _dtStart.AddMilliseconds(timeStamp);
            }
             DateTime.MinValue;
        }
    }
}

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