Dev iconDevSep 14, 2026 ~1 min source read

Your first ASP.NET App: Dependency Injection

In this tutorial we will build your own ASP.NET Service Dependency Injection! Requirements IDE like Visual Studio/JetBrains Rider.NET >= 10 Base C# skill CPU (manually).

Your first ASP.NET App: Dependency Injection

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In this tutorial we will build your own ASP.NET Service Dependency Injection!

Requirements IDE like Visual Studio/JetBrains Rider.NET >= 10 Base C# skill CPU (manually).

Base DI types Microsoft.Extensions.DependencyInjection has 3 base lifetime types.

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The useful part

In this tutorial we will build your own ASP.NET Service Dependency Injection! Requirements IDE like Visual Studio/JetBrains Rider.NET >= 10 Base C# skill CPU (manually). Base DI types Microsoft.Extensions.DependencyInjection has 3 base lifetime types.

How it works

  • Every HTTP-Request has own Scope, scoped lives in scope like IUserRepository, IAuthService.
  • Singleton Scoped Transient A singleton lives for the entire duration of the application's execution.

Details worth keeping

A scoped lives for every HTTP-request as example. Like IEmailSender, IValidator, or lightweight helper services.

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