json日期格式转换成日期字符串

这里进行去掉json日期的\date\字符串：
    strDate = dr["NewsTime"].ToString().Replace("/Date(", "").Replace("/","").Replace("\\","").Replace(")","");
下面进行转换：   

 public DateTime ConvertTime(long milliTime)
    {
        long timeTricks = new DateTime(1970, 1, 1).Ticks + milliTime * 10000 + TimeZone.CurrentTimeZone.GetUtcOffset(DateTime.Now).Hours * 3600 * (long)10000000;
        return new DateTime(timeTricks);
    }