Unable to resolve service: retarget net10.0, drop Swashbuckle, add string and HttpClient scenarios - #2228
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…ring and HttpClient scenarios - Both projects net7.0 to net10.0. - Swashbuckle.AspNetCore removed with AddEndpointsApiExplorer, AddSwaggerGen, UseSwagger and UseSwaggerUI; AddOpenApi and MapOpenApi in their place, as the .NET 10 template has them. - Microsoft.AspNetCore.OpenApi and Microsoft.AspNetCore.Mvc.Testing 10.0.12, NUnit 4.6.1, NUnit3TestAdapter 6.3.0, NUnit.Analyzers 4.15.0, Microsoft.NET.Test.Sdk 18.10.1, coverlet.collector 10.0.1. - Program.cs comment now says the service is registered with a scoped lifetime, which is what the AddScoped line under it does. - New string scenario: SmtpSettings options class, an Smtp section in appsettings.json, and an EmailService that asks for IOptions<SmtpSettings> instead of a plain string. - New HttpClient scenario: AddHttpClient() plus a WeatherClient typed client. - One test per new scenario resolving the services from the built app. - UserControllerIntegrationTest disposes its client and factory in a OneTimeTearDown (NUnit.Analyzers 4.15.0 reports NUnit1032 as an error without it) and is now public.
With Swashbuckle gone, launchUrl "swagger" opened a page that no longer exists. The profile now opens GET api/User, the sample's endpoint.
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Sample for the article "Unable to Resolve Service for Type: How to Fix It in .NET" (code-maze.com/dotnet-how-to-solve-unable-to-resolve-service-for-a-type/). Touches only
dotnet-dependency-injection/FixUnableToResolveServiceIssue.Changes
net7.0tonet10.0.Swashbuckle.AspNetCorereference,AddEndpointsApiExplorer(),AddSwaggerGen(),UseSwagger()andUseSwaggerUI().AddOpenApi()andMapOpenApi()replace them inside the existingIsDevelopment()block, as the .NET 10webapitemplate emits them.Properties/launchSettings.json:launchUrlwasswagger, a page that no longer exists once Swashbuckle is removed. It now opensapi/User, the sample's endpoint.Program.cscomment aboveAddScoped<IUserService, UserService>()said "as a singleton". It now says "with a scoped lifetime", which is what the line does.string:Settings/SmtpSettings.cs, anSmtpsection inappsettings.json,Configure<SmtpSettings>(...)inProgram.cs, andServices/EmailService.cstakingIOptions<SmtpSettings>.HttpClientorIHttpClientFactory:AddHttpClient()plus aServices/WeatherClient.cstyped client registered withAddHttpClient<WeatherClient>(...).Services/ServiceResolutionTest.csadds one test per new scenario, resolving the services from the built app.UserControllerIntegrationTestnow disposes itsHttpClientandWebApplicationFactoryin a[OneTimeTearDown]. NUnit.Analyzers 4.15.0 reports NUnit1032 as a build error without it. The test's assertions are unchanged. The fixture is alsopublicnow. That change is cosmetic: NUnit 4 discovered and ran it asinternaltoo.Package versions (re-queried on NuGet 2026-09-23)
The batch plan named Microsoft.NET.Test.Sdk 18.10.0. The re-query found 18.10.1, and that is the version used.
Microsoft.AspNetCore.OpenApi10.0.10 (the version the template pins) raises NU1903 for a transitiveMicrosoft.OpenApi. 10.0.12 restores clean.Verified locally
dotnet build -c Release: 0 warnings, 0 errors.dotnet test -c Release --filter "FullyQualifiedName!~Live": 3 passed, 0 failed.dotnet list package --vulnerable --include-transitive: no vulnerable packages in either project.