Whatever you do, don't ask an internet board for advice about what to do.
Any "line", no matter how good, is likely going to fail.
"So, do you...like...stuff?"
If you don't know her well enough to feel comfortable to ask her, then you probably don't know her well enough for her to feel comfortable going out with you.
:2 cents:
You are thinking about the whole situation wrong. Don't think about it in terms of "asking her out" or "making a move." A "move" that can be "turned down". Get to know
her (you want to know her right) - ask her about herself. Find a common interest. Then it won't be so difficult or uncertain.
Once you have something in common, then she may invite you to do that with her (and friends) or you can invite her. In that more casual setting you can treat her well and find out if she is really interested in you. If she is, she will make it clear with hints and open opportunities.
Then you won't need to ask anybody because you will already know when the time is right.
oh...oh ... and don't forget to enjoy right now. The anticipation is one of the best moments. Savor It.