static void Main()
{
Console.WriteLine("It shows system time columns:");
var t1 = new SystemTime {Name = "tom"};
t1.Save();
var t2 = SystemTime.FindById(t1.Id);
Console.WriteLine("1) => {0}", t2);
Thread.Sleep(2000);
t1.Save();
var t3 = SystemTime.FindById(t1.Id);
Console.WriteLine("2) => {0}", t3);
}