Asp.Net: No suitable Constructor for AuthenticationMiddleware
<p>I'm currently trying to write an AuthenticationMiddleware. See <a href="https://stackoverflow.com/a/31688792/1171404">this answer</a>. The app builds with no error but when I execute <code>dnx web</code> I get the following error:</p>

<blockquote>
  <p>Unable to locate suitable constructor for type 'Namespace.BasicAuthenticationMiddleware'. Ensure the type is concrete and all parameters are accepted by a constructor.</p>
  
  <p>at Microsoft.Extensions.Internal.ActivatorUtilities.CreateInstance(IServiceProvider
   provider, Type instanceType, Object[] parameters)</p>
  
  <p>at Microsoft.AspNet.Builder.UseMiddlewareExtensions.&lt;>c__DisplayClass2_0.b__0(RequestDelegate next)</p>
  
  <p>at Microsoft.AspNet.Builder.Internal.ApplicationBuilder.Build()</p>
  
  <p>at Microsoft.AspNet.Hosting.Internal.HostingEngine.BuildApplication()</p>
  
  <p>fail: Microsoft.AspNet.Hosting.Internal.HostingEngine[7]</p>
</blockquote>

<p>I'm sure that the Constructor signature I use is wrong in some way but I'm not able to find a suitable documentation for this, since it seems like there are dozens of deprecated ones.</p>

<p>This is the AuthenticationMiddleware:</p>

<pre><code>public class BasicAuthenticationMiddleware : AuthenticationMiddleware&lt;BasicAuthOptions&gt;
{
    public BasicAuthenticationMiddleware(
        RequestDelegate next, 
        BasicAuthOptions options, 
        ILoggerFactory loggerFactory, 
        IUrlEncoder urlEncoder)
        : base(next, options, loggerFactory, urlEncoder) {}

    protected override AuthenticationHandler&lt;BasicAuthOptions&gt; CreateHandler()
    {
        return new BasicAuthenticationHandler();
    }
}
</code></pre>

<p>BasicAuthOptions:</p>

<pre><code>public class BasicAuthOptions : AuthenticationOptions {
    public const string Scheme = "BasicAuth";
    public BasicAuthOptions()
    {
        AuthenticationScheme = Scheme;
        AutomaticAuthenticate = true;
    }
}
</code></pre>

<p>BasicAuthenticationExtensions</p>

<pre><code>public static class BasicAuthenticationExtensions
{
    public static void UseBasicAuthentication(this IApplicationBuilder builder) {
        builder.UseMiddleware&lt;BasicAuthenticationMiddleware&gt;(new ConfigureOptions&lt;BasicAuthOptions&gt;(o =&gt; new BasicAuthOptions()));
    }
}
</code></pre>

<p>Startup.cs:</p>

<pre><code>public class Startup
{
    public Startup(IHostingEnvironment env)
    {
        // Set up configuration sources.
        var builder = new ConfigurationBuilder()
            .AddJsonFile("appsettings.json")
            .AddEnvironmentVariables();
        Configuration = builder.Build();
    }

    public IConfigurationRoot Configuration { get; set; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        // Add framework services.
        services.AddMvc();

        services.AddAuthorization(options =&gt; {
            options.AddPolicy(BasicAuthOptions.Scheme, policy =&gt; policy.Requirements.Add(new BasicAuthRequirement()));
        });
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        loggerFactory.AddConsole(Configuration.GetSection("Logging"));
        loggerFactory.AddDebug();

        app.UseIISPlatformHandler();

        app.UseStaticFiles();

        app.UseBasicAuthentication();

        app.UseMvc();
    }

    // Entry point for the application.
    public static void Main(string[] args) =&gt; Microsoft.AspNet.Hosting.WebApplication.Run&lt;Startup&gt;(args);
}
</code></pre>