HomeController.cs

using System;
using Microsoft.AspNetCore.Diagnostics;
using Microsoft.AspNetCore.Mvc;

namespace GlobalExceptionHandling.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Error()
        {
            // Get the details of the exception that occurred
            var exceptionFeature = HttpContext.Features.Get<IExceptionHandlerPathFeature>();

            if (exceptionFeature != null)
            {
                // Get which route the exception occurred at
                string routeWhereExceptionOccurred = exceptionFeature.Path;

                // Get the exception that occurred
                Exception exceptionThatOccurred = exceptionFeature.Error;

                // TODO: Do something with the exception
                // Log it with Serilog?
                // Send an e-mail, text, fax, or carrier pidgeon?  Maybe all of the above?
                // Whatever you do, be careful to catch any exceptions, otherwise you'll end up with a blank page and throwing a 500
            }

            return View();
        }
    }
}