C# Integration with Amazon Affiliate API and eBay Affiliate API

General information for the business: We build search engine optimised web site to drive traffic via affiliate APIs
Description of requirements/functionality: We need 2 C# classes that integrate with the Amazon Affiliate API and the eBay Affiliate API for retrieval of product information. The classes should have three methods:

RetrieveProducts(string keywords) - This should perform a keyword search via the affiliate API and return a list of matching products

RetrieveProducts(object category, string keywords) - This should perform a keyword search via the affiliate API under a specific category, i.e. Laptops, Clothing, etc. and return a list of matching products

RetrieveProduct(object productID) - This should return the product from the affiliate API with the matching product ID

I would like the products returned from the methods via a class with the following properties:

string ProductName
string ProductDescription
decimal Price
string ImageUrl
object ProductID

Where a list of products are returned I am happy for them to be returned as an ICollection or iList.

This should be developed using C# and the .Net Framework 4.5. Please let me know if you plan to use any third party components.

I am happy for API keys/credentials to be hard coded into the C# classes. I will refactor the classes and place these into a config file later.

Thanks,

Ben
Specific technologies required: .Net Framework 4.5, C#
OS requirements: Windows
Extra notes: