static void Main(string[] args)
{
x = new CachedField <string>(() => { Thread.Sleep(5000); return(DateTime.Now.ToString()); }, new TimeSpan(0, 0, 30));
x.OnInvalidated += X_OnInvalidated;
new Thread(() => { while (true)
{
Thread.Sleep(10000); x.Invalidate();
}
}).Start();
new Thread(() => { while (true)
{
Thread.Sleep(20000); x.Invalidate();
}
}).Start();
while (true)
{
Console.WriteLine(x.Value);
Thread.Sleep(2 * 1000);
}
}
