Explain please AsParallel()

Can somebody explain me one thing. As I understand AsParallel() executes in own task. So, if query return huge amount of data the variable 'd' can be empty at time when 'foreach' started to execute Console.WriteLine?

var integerList = Enumerable.Range(1, 100);
var d = from x in integerList.AsParallel()
where x <= 25
select x;
foreach (var v in d)
{
Console.WriteLine(v);
}