ASP.NET MVC Service Disposal

Log.txt

Using launch settings from C:\Users\jberube\source\repos\WebApplication2\WebApplication2\Properties\launchSettings.json...
Hosting environment: Development
Content root path: C:\Users\jberube\source\repos\WebApplication2\WebApplication2
Now listening on: http://localhost:22449
Application started. Press Ctrl+C to shut down.
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:22449/singleton  
info: WebApplication2.Program.Test[0]
      new Singleton()
info: WebApplication2.Program.Test[0]
      Singleton.GetId() = e215122b-ff3d-4601-bafb-ac53a79b832c
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 14.3441ms 200 
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:22449/singleton  
info: WebApplication2.Program.Test[0]
      Singleton.GetId() = 733cbac6-7bb3-4d0a-863e-bf42d51b5d86
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 0.2627ms 200 
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:22449/scoped  
info: WebApplication2.Program.Test[0]
      new Scoped()
info: WebApplication2.Program.Test[0]
      Scoped.GetId() = bc4906d9-82db-4cc2-a1ae-d245c610c1f9
info: WebApplication2.Program.Test[0]
      Scoped.Dispose()
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 1.5986ms 200 
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:22449/scoped  
info: WebApplication2.Program.Test[0]
      new Scoped()
info: WebApplication2.Program.Test[0]
      Scoped.GetId() = 0b68d19e-db83-4efc-b963-a8b9e6bc666f
info: WebApplication2.Program.Test[0]
      Scoped.Dispose()
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 0.1761ms 200 
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:22449/scoped  
info: WebApplication2.Program.Test[0]
      new Scoped()
info: WebApplication2.Program.Test[0]
      Scoped.GetId() = 4bf85c93-3926-4d02-a644-219186e66113
info: WebApplication2.Program.Test[0]
      Scoped.Dispose()
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 0.1576ms 200 
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:22449/transient/4  
info: WebApplication2.Program.Test[0]
      new Transient()
info: WebApplication2.Program.Test[0]
      Transient.GetId() = 02d9f6bf-0aa8-4aaa-b158-5575f477c532
info: WebApplication2.Program.Test[0]
      new Transient()
info: WebApplication2.Program.Test[0]
      Transient.GetId() = c6a1fd4c-b471-416f-af64-e2810818033f
info: WebApplication2.Program.Test[0]
      new Transient()
info: WebApplication2.Program.Test[0]
      Transient.GetId() = 118d0262-8bd7-4e3b-82c6-43763d1920c4
info: WebApplication2.Program.Test[0]
      new Transient()
info: WebApplication2.Program.Test[0]
      Transient.GetId() = ca8f67df-724e-40c4-88ac-48a92d1bf4bc
info: WebApplication2.Program.Test[0]
      Transient.Dispose()
info: WebApplication2.Program.Test[0]
      Transient.Dispose()
info: WebApplication2.Program.Test[0]
      Transient.Dispose()
info: WebApplication2.Program.Test[0]
      Transient.Dispose()
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 1.8306ms 200 

Program.cs

using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using System;
using System.Text;

namespace WebApplication2
{
    public class Program
    {
        public static void Main(string[] args) =>
            BuildWebHost(args).Run();

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Program>()
                .Build();
        
        public void ConfigureServices(IServiceCollection services) =>
            services.AddScoped(svc =>
            {
                var logger = svc.GetRequiredService<ILogger<Test<Scoped>>>();
                return new Test<Scoped>(logger);
            })
            .AddSingleton(svc =>
            {
                var logger = svc.GetRequiredService<ILogger<Test<Singleton>>>();
                return new Test<Singleton>(logger);
            })
            .AddTransient(svc =>
            {
                var logger = svc.GetRequiredService<ILogger<Test<Transient>>>();
                return new Test<Transient>(logger);
            });

        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.Run(async (context) =>
            {
                var req = context.Request.Path;
                var id = req.StartsWithSegments("/scoped")
                    ? GetIdFromScoped(context.RequestServices)
                    : req.StartsWithSegments("/singleton")
                        ? GetIdFromSingleton(context.RequestServices)
                        : req.StartsWithSegments("/transient", out var remaining)
                            ? GetIdFromTransient(context.RequestServices, GetCountFromPath(remaining))
                            : GetIdForDefaultPath(context.RequestServices);

                await context.Response.WriteAsync(id);

                string GetIdForDefaultPath(IServiceProvider services) =>
                    GetIdFromScoped(services);
                string GetIdFromScoped(IServiceProvider services) =>
                    services.GetRequiredService<Test<Scoped>>().GetId().ToString();
                string GetIdFromSingleton(IServiceProvider services) =>
                    services.GetRequiredService<Test<Singleton>>().GetId().ToString();
                string GetIdFromTransient(IServiceProvider services, int count)
                {
                    var sb = new StringBuilder(36 * count);
                    for (int i = 0; i < count; i++)
                    {
                        sb.AppendLine(services.GetRequiredService<Test<Transient>>().GetId().ToString());
                    }
                    return sb.ToString();
                }
                    
                int GetCountFromPath(PathString path) =>
                    int.TryParse(path.Value.Length > 0 ? path.Value.Substring(1) : "", out var i) ? i : 1;
            });
        }

        struct Scoped { }
        struct Singleton { }
        struct Transient { }
        
        class Test<T> : IDisposable
        {
            readonly ILogger<Test<T>> _logger;
            public Test(ILogger<Test<T>> logger)
            {
                _logger = logger;
                _logger.LogInformation("new {typeName}()", typeof(T).Name);
            }

            public Guid GetId()
            {
                Guid id = Guid.NewGuid();
                _logger.LogInformation("{typeName}.GetId() = {id}", typeof(T).Name, id);
                return id;
            }

            public void Dispose() =>
                _logger.LogInformation("{typeName}.Dispose()", typeof(T).Name);
        }
    }
}