Payment gateway for dot net website

I am in need of a payment gateway for my dot net website. I would prefer to use PayPal as the payment gateway.

Requirements:
- Integration of PayPal payment gateway into my dot net website
- Support for multiple currencies is not required
- Implementation of the payment gateway should be completed within 1 day

Ideal Skills and Experience:
- Experience with integrating PayPal payment gateway into dot net websites
- Knowledge of dot net programming language
- Familiarity with e-commerce and online payment systems