SqlDataReader and DataSet

Question

Hi all,
I have some problem. I have one table and have data over 700 record,
when i write code for select some data in table it very late for show in textbox.
I used SqlDataReader for select it. I don't know how to make it faster.
If all of friend know it please tell me about the way for make it faster when select data.
send code to me too.

Thank