Kentico12-TipsTricks-Structure-RouteCollectionExtensions.cs

public static class RouteCollectionExtensions
{
    public static void MapRoute<T>(
        this RouteCollection routes,
        string name,
        string url,
        Func<T, string> nameOfDefaultAction) where T : Controller
    {
        string controller = typeof(T).RemoveControllerSuffix();
        string action = nameOfDefaultAction(default);

        routes.MapRoute(name, url, new
        {
            controller,
            action
        });
    }

    /**
    * "Controller".Length
    */
    private const int CONTROLLER_SUFFIX_LENGTH = 10;

    public static string RemoveControllerSuffix(this Type controllerType)
    {
        Guard.Against.Null(controllerType, nameof(controllerType));

        if (!typeof(Controller).IsAssignableFrom(controllerType))
        {
            throw new ArgumentException($"Type [{controllerType.Name}] is not assignable from [{nameof(Controller)}]");
        }

        return controllerType
            .Name
            .Substring(0, controllerType.Name.Length - CONTROLLER_SUFFIX_LENGTH);
    }
}