Task.WaitAny does not care when a task has finished

TaskWaitAny.cs

void Main()
{
	var task1 = Task.Factory.StartNew(() => {
		Thread.Sleep(1);
		return 1;
	});
	
	var task2 = Task.Factory.StartNew(() => {
		Thread.Sleep(1);
		return 2;
	});
	
	var tasks = new Task<int>[] {task1, task2};
	for(var i = 0; i < 10; i++)
	{
		var taskId = Task.WaitAny(tasks);
		tasks[taskId].Result.Dump(); // non-deterministic result
	}
}