Example of controlled tasks creation

gistfile1.txt

class Program
{
	public static int i;
	static void Main(string[] args)
	{
		SemaphoreSlim sem = new SemaphoreSlim(15, 15);
		int amountOfWork = 2000;
		while (amountOfWork > 0)
		{
			sem.Wait();
			Task.Factory.StartNew(() => DoJob(sem));
			amountOfWork -= 1;
		}

		Console.Read();
	}

	public static void DoJob(SemaphoreSlim sem)
	{
		Interlocked.Increment(ref i);
		Console.WriteLine(i);
		Thread.Sleep(1500);
		sem.Release();
	}
}