Why Data manipulation occur when refresh the page in Asp.net
<p>Why Data manipulation occur when refresh the page in Asp.net</p>

<p>After submit the button to insert data to database table if i press f5 or browser refresh then again dulicate data is inserted why it is maintaining the textbox values and without clicking the submit button it is fired......?
provide solution.........</p>

<p>Thanks in Advance..........</p>
