Payment gateway ccavenue ASP .NET

I need a payment gateway integration code in C#, ASP. NET.. The payment mode would be exactly as it is in this "freelancer" site. A user should be able to: 1. Deposit funds. 2. Create milestone payments( make it against dummy entities for now). 3. Release milestones. 4. Transfer funds to another user. 5. View payments and export invoice to CSV and pdf. The "Deposit funds" should be integrated with ccavenue. For an example please refer to rechargeitnow.com. There should be an admin page in the site where I could give the receiver's account details. The site must be coded in C#, ASP. NET.