Pay Pal

For Testing make a/c in Paypal sandbox as below:
developer.paypal.com
Main a/c login
Types of a/c:
1) Personal account, Business account, Merchant account
2) Seller account, Merchant account, Business account

 
Pay Pal Implementation in projects of asp.net

<body onload="document.getElementById ('btntext').click();">
<form action="https://www.sandbox.paypal.com/cgi-bin/webserver" method="Post">
<input type ="hidden" name ="cmd" value="_xclick"/>
<input type ="hidden" name ="business" value="abc@cs.com"/>
</* here in value mention ur receving account name8/>
<input type ="hidden" name ="item_name" value='Book Purchase payment'/>
<input type ="hidden" name ="amount" value='<%=Session["amt"]%>'/>
<input type ="hidden" name ="return" value="confirm.aspx"/>
<input type ="hidden" name ="Cancel_return" value="cancel_confirm.aspx"/>
<input type ="hidden" name ="rm" value="2"/>
/* Here rm is a web standard method of Paypal having values is 2 don't change these neither it does not run or give the desired results. It generates transaction id and it is pass through Query String */
<input type ="Submit" Style="display:none; id="btntest" value ="Buy with additonal parameters!"/>
Please Wait...............
</form>
</body>