You can create two different kinds of extensions using Feature Builder. A standard Feature Extension can contain tools, code, and a simple map - it will run on the Visual Studio Premium and Visual Studio Professional editions (in the final version of this tool). A more advanced extension, called an Ultimate Feature Extension, can contain everything a feature extension can contain, as well as rich modeling and visualization tools that can take advantage of the modeling platform inside the Visual Studio 2010 Ultimate edition (required). These tools can be used to provide a logical view of your target solution, and to visualize your existing code. This is the preferred type of extension to use if you intend to provide architectural guidance or share specific refactoring or pattern knowledge.
This preview requires Windows 7 or Windows Server 2008 R2, Visual Studio 2010 Ultimate Edition, and the installation of the Visual Studio SDK (RC1 Version) to build Feature Extensions. The Feature Extensions you create have the same requirements except for the SDK. The RTM version of this tool will require Visual Studio 2010 Ultimate Edition to create Feature Extensions, but will allow you to create Feature Extensions which do not require the Ultimate Edition to run.
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