Why Does This Page Not Show Up?

I'm brand new to C#, so there's the reason for my obvious lack of "sense" when it comes to this.

I'm working on an already existing project. I've been asked to construct a new page and I'm familiar enough with the MVC architecture to have an idea of what needs to be in place, but I'm stuck.

Here's a screenshot of the project as it exists currently:


This new page is in the Maintenance Area. I've got my Controller set up (DrawingType) and the code looks like this:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;

// For more information on enabling MVC for empty projects, visit http://go.microsoft.com/fwlink/?LinkID=397860

namespace Planroom.Web.Areas.Maintenance.Controllers
{
    public class DrawingTypeController : Controller
    {
        // GET: /<controller>/
        public IActionResult Index()
        {
            return View();
        }
    }
}

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You can tell my the graphic that it's going to the Views/DrawingType folder and looking for the Index.cshtml page, which looks like this:

@{
    ViewBag.Title = "About";
    ViewBag.BodyClass = "";
}

<div>
    <h2>Bruce's First .NET Page!</h2>
    <div>
    </div>

    <div>
        If you have any questions related to this website, please email us
        <a href="mailto:itsupport@capnet.ucla.edu">IT Staff</a>.
        <br />
    </div>
</div>

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I'm missing something because the page keeps coming up as "not found." What am I missing?
drawingtype_controller.JPG