Startup error

[paulvanbladel]

Hi Damien, I trust you are fine. Trying this sample but running into this issue. Any idea? How a great day paul.

System.InvalidOperationException: The service collection cannot be modified because it is read-only.
   at Microsoft.Extensions.DependencyInjection.ServiceCollection.ThrowReadOnlyException()
   at Microsoft.Extensions.DependencyInjection.ServiceCollection.System.Collections.Generic.ICollection<Microsoft.Extensions.DependencyInjection.ServiceDescriptor>.Add(ServiceDescriptor item)
   at Microsoft.Extensions.DependencyInjection.ServiceCollectionServiceExtensions.AddTransient(IServiceCollection services, Type serviceType, Type implementationType)
   at Microsoft.Extensions.DependencyInjection.OptionsBuilderExtensions.ValidateOnStart[TOptions](OptionsBuilder`1 optionsBuilder)
   at Microsoft.Extensions.DependencyInjection.MetricsServiceExtensions.AddMetrics(IServiceCollection services)
   at Microsoft.Extensions.DependencyInjection.HttpClientFactoryServiceCollectionExtensions.AddHttpClient(IServiceCollection services)
   at Microsoft.Identity.Web.MicrosoftIdentityWebAppAuthenticationBuilderWithConfiguration.<EnableTokenAcquisitionToCallDownstreamApi>b__1_0(ConfidentialClientApplicationOptions options)
   at Microsoft.Extensions.Options.OptionsFactory`1.Create(String name)
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at Microsoft.Extensions.Options.OptionsCache`1.GetOrAdd[TArg](String name, Func`3 createOptions, TArg factoryArgument)
   at Microsoft.Extensions.Options.OptionsMonitor`1.Get(String name)
   at Microsoft.Identity.Web.MicrosoftIdentityWebAppAuthenticationBuilder.<>c__DisplayClass11_0.<WebAppCallsWebApiImplementation>b__0(OpenIdConnectOptions options, IMergedOptionsStore mergedOptionsMonitor, IOptionsMonitor`1 ccaOptionsMonitor, IOptions`1 ccaOptions)
   at Microsoft.Extensions.Options.ConfigureNamedOptions`4.Configure(String name, TOptions options)
   at Microsoft.Extensions.Options.OptionsFactory`1.Create(String name)
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at Microsoft.Extensions.Options.OptionsCache`1.GetOrAdd[TArg](String name, Func`3 createOptions, TArg factoryArgument)
   at Microsoft.Extensions.Options.OptionsMonitor`1.Get(String name)
   at Microsoft.AspNetCore.Authentication.AuthenticationHandler`1.InitializeAsync(AuthenticationScheme scheme, HttpContext context)
   at Microsoft.AspNetCore.Authentication.AuthenticationHandlerProvider.GetHandlerAsync(HttpContext context, String authenticationScheme)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at HostedBlazorAad.Server.Services.ApplicationBuilderExtensions.<>c__DisplayClass0_0.<<UseNoUnauthorizedRedirect>b__0>d.MoveNext() in E:\github3rd\Hostedblazor8Aad\HostedBlazorAad\Server\Services\ApplicationBuilderExtensions.cs:line 16
--- End of stack trace from previous location ---
   at NetEscapades.AspNetCore.SecurityHeaders.SecurityHeadersMiddleware.Invoke(HttpContext context) in /_/src/NetEscapades.AspNetCore.SecurityHeaders/SecurityHeadersMiddleware.cs:line 68
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)

[paulvanbladel]

Hi Damien, I saw you have a full blown template specifically for this case: https://github.com/damienbod/Blazor.BFF.AzureAD.Template I switched to that, and it works like a charm. Allow me to tell you i am very grateful to all the beautiful work you add in the .net security ecosystem. Very much appreciated. I close this issue of course. All the best paul.

[damienbod]

@paulvanbladel Thanks for the feedback! Glad it works, I'll fix this when I get time

Greetings Damien