I've read this and this and nuget docs. But I can't get it to work.
This is my configuration:
I have a "File/New Project" Console Application, My project folder is:
c:\ConsoleApplication1\ConsoleApplication1
    ... Program.cs and source files
c:\ConsoleApplication1\ConsoleApplication1.sln
c:\ConsoleApplication1\nuget.config
My nuget.config file is:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <config>
    <add key="repositorypath" value="c:\blah" />
  </config>
</configuration>
Now, when I install or restore packages, they are always installed to a packages folder inside my project's folder
I'm using VisualStudio 2015 RC
 
    