Windows Phone 8 In-App Purchasing error

Question

I am facing a really weird problem in implementing in-app purchasing for WP8. I create a WP8 solution from one of the standard templates and begin following the Microsoft guide, which states this code to begin retrieving the products:

// First, retrieve the list of some products by their IDs.
ListingInformation listings = await CurrentApp.LoadListingInformationByProductIdsAsync(new string[] { "Bag of 50 gold", "Bag of 100 gold" });

And here is how I have it in my test solution:

IEnumerable<string> productIDs = new List<string>() {"Bag of 50 gold", "Bag of 100 gold"};
ListingInformation listings = await CurrentApp.LoadListingInformationByProductIdsAsync(productIDs);

And here is the error that VS2012 gives me:

I typed it below since the image is hard to read:

'System.Collections.Generic.IEnumerable [mscorlib, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]' is not assignable to parameter type 'System.Collections.Generic.IEnumerable [System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]'

The project template references '.NET for Windows Phone' & 'Windows Phone'.

I have not encountered such an error before and have not found any help through search.

Answer 1

This is a Resharper problem. Install Resharper 8.2.1 RC (http://www.jetbrains.com/resharper/download/)