I created an example FSharp.Data.SqlClient console app to isolate a problem I'm having using it with Visual Studio 2015 Preview. The app simple runs a query against a hosted AdventureWorks on Azure. It prints the top the first 10 people using select top 10 FirstName, LastName from person.person.
When running from Visual Studio 2013 it works.

When I use Visual Studio 2015 Preview, I get:

The build does give this warning:

For some reason, the PeopleData.dll is ending up with a reference to 4.4.0.0, but I'm not sure how.

Here are the steps to reproduce:
PS> git clone https://github.com/ctaggart/Paket09x.git -b PeopleSql
PS> .\Paket09x\PeopleSql.sln
Rebuild solution. (It is not using Paket.)