ASP.NET：自1970年1月1日以来获得的毫秒数

DateTime

TimeSpan

TotalMilliseconds

    DateTime dt1970 = new DateTime(1970, 1, 1);
    DateTime current = DateTime.Now;//DateTime.UtcNow for unix timestamp
    TimeSpan span = current - dt1970;
    Console.WriteLine(span.TotalMilliseconds.ToString());

//DateTime.MinValue is 01/01/01 00:00 so add 1969 years. to get 1/1/1970
DateTime.Now.Subtract(DateTime.MinValue.AddYears(1969)).TotalMilliseconds;

DateTimeOffset.Now.ToUnixTimeMilliseconds()

new DateTimeOffset(dateTime).ToUnixTimeMilliseconds()

long epochTime = (DateTime.UtcNow.Ticks - 621355968000000000) / 10000;

DateTime d = new DateTime(1970, 01, 01);
var temp = d.Ticks; // == 621355968000000000

Split(DateTime.UtcNow.Subtract(DateTime.MinValue.AddYears(1969)).TotalMilliseconds(), \".\", 2)(0)