I started using Sandcastle some time ago to generate a Documentation Website for one of our projects. It\'s working quite well but we\'ve always only written documentation f
I know it's an old post, but this may be of help to someone else.
Following this link, you can set a description for the namespaces without the need of adding a non-public class to your project.
To edit the namespace summaries, expand the Summaries section within the Project Properties tab in SHFB. You will see a setting named, "NamespaceSummaries", which initially shows the value, "(None)". Click the setting to select it and a button showing an ellipsis symbol (...) appears. Click this button to display the Namespace Summaries dialog box, pictured below: