Writes the factorial by awaiting on FindFactorial

AsyncAwait_WriteFactorialAsyncUsingAwait

private async Task WriteFactorialAsyncUsingAwait(int facno)
{
    int result = await Task.Run(()=> FindFactorialWithSimulatedDelay(facno));
    Console.WriteLine("Factorial of {0} is {1}", facno, result);
}
public void Main()
{
    for (int counter = 1; counter < 5; counter++)
    {
        if (counter % 3 == 0)
        {
            WriteFactorialAsyncUsingAwait(counter);
        }
        else
        {
            Console.WriteLine(counter);
        }
    }
    Console.ReadLine();
}