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Fix API link (#13685)

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Luke Latham 2019-08-06 07:31:40 -05:00 committed by GitHub
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aspnetcore/fundamentals/dependency-injection.md
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@ -5,7 +5,7 @@ description: Learn how ASP.NET Core implements dependency injection and how to u
monikerRange: '>= aspnetcore-2.1'
ms.author: riande
ms.custom: mvc
ms.date: 07/24/2019
ms.date: 08/06/2019
uid: fundamentals/dependency-injection
---
# Dependency injection in ASP.NET Core
@ -169,7 +169,7 @@ Scoped lifetime services (<xref:Microsoft.Extensions.DependencyInjection.Service
### Singleton
Singleton lifetime services (<xref:Microsoft.AspNet.OData.Builder.ODataModelBuilder.AddSingleton*>) are created the first time they're requested (or when `Startup.ConfigureServices` is run and an instance is specified with the service registration). Every subsequent request uses the same instance. If the app requires singleton behavior, allowing the service container to manage the service's lifetime is recommended. Don't implement the singleton design pattern and provide user code to manage the object's lifetime in the class.
Singleton lifetime services (<xref:Microsoft.Extensions.DependencyInjection.ServiceCollectionServiceExtensions.AddSingleton*>) are created the first time they're requested (or when `Startup.ConfigureServices` is run and an instance is specified with the service registration). Every subsequent request uses the same instance. If the app requires singleton behavior, allowing the service container to manage the service's lifetime is recommended. Don't implement the singleton design pattern and provide user code to manage the object's lifetime in the class.
> [!WARNING]
> It's dangerous to resolve a scoped service from a singleton. It may cause the service to have incorrect state when processing subsequent requests.