Create a menu from Application components.

ExampleMetadata.cs

using Microsoft.AspNetCore.Components;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Reflection;
using System.Text.RegularExpressions;
public static class ExampleMetadata
{
    public static IEnumerable<MenuItem> GetItems()
    {
        return Assembly
            .GetExecutingAssembly()
            .ExportedTypes
            .Select(t => MenuItem.From(t))
            .Where(ri => !string.IsNullOrEmpty(ri.Route));
    }

    public class MenuItem
    {
        public string Route { get; private set; }
        public string ComponentName { get; private set; }
        public string Name { get; private set; }
        public string ShortName { get; private set; }

        public static MenuItem From(Type type)
        {
            var routeAttribute = type.GetCustomAttribute<RouteAttribute>();
            var displayAttribute = type.GetCustomAttribute<DisplayAttribute>();
            bool hasName = !string.IsNullOrEmpty(displayAttribute?.Name);
            var hasShortName = !string.IsNullOrEmpty(displayAttribute?.ShortName);
            static string FromCamelCase(string s) => Regex.Replace(s, "(\\B[A-Z])", " $1");

            return new MenuItem
            {
                Route = routeAttribute?.Template,
                ComponentName = type.Name,
                Name = hasName ? displayAttribute.Name : FromCamelCase(type.Name),
                ShortName = hasShortName ? displayAttribute.ShortName : type.Name
            };
        }
    }
}