Delphi的TSearchRec.Time格式是旧的DOS 32位日期/时间值。据我所知，没有内置的转换器，所以你得写一个。例如：

public static DateTime DosDateToDateTime(int DosDate)
{
     Int16 Hi = (Int16)((DosDate & 0xFFFF0000) >> 16);
     Int16 Lo = (Int16)(DosDate & 0x0000FFFF);

     return new DateTime(((Hi & 0x3F00) >> 9) + 1980, (Hi & 0xE0) >> 5, Hi & 0x1F,
        (Lo & 0xF800) >> 11, (Lo & 0x7E0) >> 5, (Lo & 0x1F) * 2);
}

Here is description of different date/time formats(Delphi的原生TDateTime是OLE自动化日期格式)。据此，您需要System.DateTime.FromFileTime()和System.DateTime.ToFileTime()+DosDateTimeToFileTime()和FileTimeToDosDateTime()函数。实际上，这是分两步进行的转换。

我尝试了谷歌搜索和实验，从伪代码开始查找类似于Unix时代的内容。

var x = 976129709;
  var target = new DateTime(2009, 1, 14, 17, 53, 26);
  var testTicks = target.AddTicks(-x);     // 2009-01-14 17:51:48
  var testMs = target.AddMilliseconds(-x); // 2009-01-03 10:44:36
  var testS = target.AddSeconds(-x);       // 1978-02-08 22:44:57
  // No need to check for bigger time units
  // since your input indicates second precision.

你能确认你的输入是正确的吗？

看在《会飞的意大利面怪物》的份上，放弃你的12小时时间格式吧！；)

我玩这个游戏已经晚了，但我已经用了好几年了，而且效果很好。它将Delphi时间转换为Windows记号，然后将其转换为日期时间。

public static DateTime DelphiTimeToDateTime(this double delphiTime)
{
    // scale it to 100nsec ticks.  Yes, we could do this as one expression
    // but this makes it a lot easier to read.

    // delphitime *= 864000000000L

    delphiTime *= 24; // hours since Delphi epoch
    delphiTime *= 60; // minutes since epoch
    delphiTime *= 60; // seconds since epoch
    delphiTime *= 1000; // milliseconds since epoch
    delphiTime *= 1000; // microseconds since epoch
    delphiTime *= 10; // 100 nsec ticks since epoch

    // Now, delphiTime is the number of ticks since 1899/12/30

    long time = 599264352000000000L; // 1/1/0001 --> 1899/12/30

    time += (long)delphiTime;

    // These are all *local* times, sadly
    return new DateTime(time, DateTimeKind.Local);
}