Sandcastle Help File Builder が、バージョン1.9.5.0で Visual Studio 2012 と .NET Framework 4.5 をサポートしました。
This new release supports Visual Studio 2010 and 2012 solutions and projects as documentation sources, and adds support for projects targeting the .NET 4.5 Framework, .NET Portable Library 4.5, and .NET for Windows Store Apps.
Sandcastle Help File Builder - Download: SHFB v1.9.5.0 with Visual Studio Package