private static void Main()
{
var primesCalculatorDel = new Primes(FindPrimes);
primesCalculatorDel.BeginInvoke(200000000, FindPrimesCallback, primesCalculatorDel);
// Func<int, List<int>> ftn = FindPrimes;
// ftn.BeginInvoke(200000000, FindPrimesCallback, ftn);
for (var i = 0; i < 10; i++)
{
Console.Write("1");
Thread.Sleep(1000);
}
}