show custom exception page in .net core

Step 1  first create the solution as below  and 

Step 2   then create the error controller 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

using Microsoft.AspNetCore.Mvc;

namespace GlobalException.Controllers

{

    public class ErrorController : Controller

    {

        [Route("Error/{StatusCode}")]

        public IActionResult StatusCodeHandle(int statusCode)

        {

            switch (statusCode)

            {

                case 404:

                    ViewBag.ErrorMessasge = $"I am having {statusCode}" + " Error code Message";

                    break;

            }

            return View(statusCode);

        }

    }

}

Step 3 create the view as below,StatusCodeHandle.cshtml

<h1>@ViewBag.ErrorMessasge</h1>

eror

Step 4 Now write the code in start file to call custom page,below highlighted code is mandatory to route the request

using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

using GlobalException.WebApi.Filter;

using Microsoft.AspNetCore.Builder;

using Microsoft.AspNetCore.Hosting;

using Microsoft.AspNetCore.Mvc;

using Microsoft.Extensions.Configuration;

using Microsoft.Extensions.DependencyInjection;

using Microsoft.Extensions.Hosting;

using Microsoft.Extensions.Logging;

namespace GlobalException

{

    public class Startup

    {

        public Startup(IConfiguration configuration)

        {

            Configuration = configuration;

        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.

        public void ConfigureServices(IServiceCollection services)

        {

            services.AddControllersWithViews(); // This is the imporatant line for handling No service reg

            services.AddMvcCore();

            services.AddScoped<IExceptionLogService, ExceptionLogService>();

            services.AddScoped<DbExceptionFiltercs>();// for Error Log

        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)

        {

            if (env.IsDevelopment())

            {

                app.UseDeveloperExceptionPage();

            }

            else

            {

                app.UseStatusCodePagesWithRedirects("/Error/{0}");       this is the import line 

            }

            

            app.UseRouting();

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>

            {

                endpoints.MapControllers();

            });

        }

    }

}

now ,i am doing the request of http://localhost:51605/weatherforecast/tip,result will be like below