title: How to generate documentation for other projects within solution using DocFx
body: <p>I am using <a href="https://github.com/dotnet/docfx" rel="noreferrer">DocFx</a> to automatically generate documentation in Visual Studio 2015.  </p>
  
  <p>Per the <a href="https://dotnet.github.io/docfx/tutorial/docfx_getting_started.html" rel="noreferrer">Getting Started</a> instructions, I added an empty ASP.NET 4 Web Application and used the Nuget Console to install the DocFx build package (e.g. <code>Install-Package docfx.msbuild</code>).  I built the site and it it generated documentation for code within the project.</p>
  
  <p>I was wondering how to configure <em>docfx.json</em> to get DocFx to document code in other projects within the solution.</p>