Do we need to schedule threads to diff processors?

[C# Programming]

Hello,

I had a machine with 4 logical processors(1 => physical processor, 2 => cores, 4 => logical processors). And I have implemented an application which can run with 25 threads.

Now, if i run my application(with 25 threads) on my machine(with 4 logical processors),
Are those 25 threads run on single processor or all 4 logical processors?

Can any one help me please..

Thanks,
Srini