PayPal express checkout is a great way to integrate payment system in .net website. It enables us to sell our digital products much easier. Though PayPal provide a SDK for .net platform, it is too complicate to use. Hence, I decide to write a simple PayPal digital goods express checkout library in C#. Before I start to introduce my PayPal express checkout library for C#, you’d better to know how PayPal express checkout works. If you are not familiar with PayPal express checkout, you can check this:
Integrate PayPal Digital Goods Express Checkout Into PHP Website
I will create this PayPal express checkout c# example in Visual Studio 2010. In the example, I will create a simple sale page and put a buy button on this page. When you click the buy button, it will popup a window to let you make payment. After purchase successfully, it will show an download link in the popup window. When you integrate this payment system in your .net website, it will make your digital products sales simple and fast. Your customers can get what they purchased immediately once they make the payment. Here are some screenshot.
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