C# Datetime retrieve microsecond

From .net 8.0 the can retrieve DateTime.Now.MicroSecond directly,but when you use the classic .net framework it does not work at all.

I'll show a round via Ticks of DateTime,to compare and validate my assumption i developed in .net 8

static void Main(string[] args)
{
    DateTime dt = DateTime.Now;
    var milliDt=new DateTime(dt.Year, dt.Month, dt.Day,dt.Hour,dt.Minute,dt.Second,dt.Millisecond);
    var dtTicks = dt.Ticks;
    var milliTicks = milliDt.Ticks;
    var microSecond = (int)((dtTicks - milliTicks) / 10);
    Console.WriteLine($"MicroSecond via ticks:{microSecond}");
    Console.WriteLine($"Microsecond:{dt.Microsecond}");
    Console.WriteLine("Hello, World!");
    
}