Hack to set a custom base view with Nancy and Razor

hackNancyRazorPageBaseType

// At this time Nancy's Razor view engine doesn't let you set a default base class like ASP.NET web pages does with pageBaseType, if you want to hack one in here is how:

// First create your custom type, this one writes out hack for everything, so obviously remove that unless you want that :)

	public abstract class MyRazorPage<T> : NancyRazorViewBase<T>
	{
		public override void Write(object value)
		{
			base.WriteLiteral("hack");
		}
	}

	public abstract class MyRazorPage : MyRazorPage<dynamic>
	{
	}
	
// Extend the default RazorViewEngine for Nancy:

	public class HackedRazorViewEngine : RazorViewEngine
	{
		public HackedRazorViewEngine(IRazorConfiguration configuration) : base(configuration)
		{
			var viewRenderers = typeof (RazorViewEngine).GetField("viewRenderers", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(this) as IEnumerable<IRazorViewRenderer>;
			viewRenderers.ToList().ForEach(r => r.Host.DefaultBaseClass = typeof (MyRazorPage).FullName);
		}
	}
	
	// this just goes through each view renderer and sets the DefaultBaseClass to your type, of course if internal implementation details change this code could break as viewRenderers are private
	
// Then in your Nancy boostrapper, override the ViewEngines:

	protected override IEnumerable<Type> ViewEngines
	{
		get
		{
			return base.ViewEngines
				.Where(e => e != typeof (RazorViewEngine));
		}
	}
		
	// this just removes the default RazorViewEngine, HackedRazorViewEngine will be scanned in automatically by Nancy