Paypal integration in ASP.net Links

http://www.spiderweblogic.com/Paypal-Integration-Code.aspx Paypal Integration Code: Using ASP.Net / C# http://www.west-wind.com/presentations/PayPalIntegration/PayPalIntegration.asp Integrating PayPal Payments into E-Commerce Applications with ASP.NET https://www.paypal.com/IntegrationCenter/ic_sdk-resource.html PayPal API: SOAP Interface