ASP.NET Core Default Namespace Area Register Convention, like MVC5 AreaRegistration

DefaultAreaConvention.cs

using System.Text.RegularExpressions;

using Microsoft.AspNetCore.Mvc.ApplicationModels;

namespace TupMvcCore.Conventions
{
    /// <summary>
    /// Default Area Load ControllerModelConvention
    /// </summary>
    public class DefaultAreaConvention : IControllerModelConvention
    {
        private static readonly string s_Area_RouteKey = "area";
        private static readonly Regex s_Area_Reg = new Regex(@"\.Areas\.(?<area>[\w\d]+)\.Controllers\.[\w\d]+Controller$", RegexOptions.IgnoreCase);
        public void Apply(ControllerModel controller)
        {
            var rValues = controller.RouteValues;
            if (rValues.ContainsKey(s_Area_RouteKey))
                return;

            var cfName = controller.ControllerType.FullName;
            var areaMatch = s_Area_Reg.Match(cfName);
            if (!areaMatch.Success)
                return;

            var areaName = areaMatch.Groups["area"].Value;
            rValues.Add(s_Area_RouteKey, areaName);
        }
    }
}

Startup.cs

    public class Startup
    {
        //.....
        public void ConfigureServices(IServiceCollection services)
        {
            //.....
            services.AddMvc(options =>
            {
                //.....
                options.Conventions.Add(new DefaultAreaConvention());
                //.....
            });
            //.....
        }
    }