Update dependency-injection.md (#21226)

Rick-Anderson · web-flow · commit d2e981b232ca · 2020-10-27T08:12:51.000-05:00
diff --git a/docs/core/extensions/dependency-injection.md b/docs/core/extensions/dependency-injection.md
@@ -168,7 +168,7 @@ In apps that process requests, scoped services are disposed at the end of the re
 When using Entity Framework Core, the <xref:Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.AddDbContext%2A> extension method registers `DbContext` types with a scoped lifetime by default.
 
 > [!NOTE]
-> Do ***not*** resolve a scoped service from a singleton. It may cause the service to have incorrect state when processing subsequent requests. It's fine to:
+> Do ***not*** resolve a scoped service from a singleton and be careful not to do so indirectly, for example, through a transient service. It may cause the service to have incorrect state when processing subsequent requests. It's fine to:
 >
 > - Resolve a singleton service from a scoped or transient service.
 > - Resolve a scoped service from another scoped or transient service.

Original file line number	Diff line number	Diff line change
`@@ -168,7 +168,7 @@ In apps that process requests, scoped services are disposed at the end of the re`
`168`	`168`	When using Entity Framework Core, the <xref:Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.AddDbContext%2A> extension method registers `DbContext` types with a scoped lifetime by default.
`169`	`169`
`170`	`170`	`> [!NOTE]`
`171`		`-> Do *not* resolve a scoped service from a singleton. It may cause the service to have incorrect state when processing subsequent requests. It's fine to:`
	`171`	`+> Do *not* resolve a scoped service from a singleton and be careful not to do so indirectly, for example, through a transient service. It may cause the service to have incorrect state when processing subsequent requests. It's fine to:`
`172`	`172`	`>`
`173`	`173`	`> - Resolve a singleton service from a scoped or transient service.`
`174`	`174`	`> - Resolve a scoped service from another scoped or transient service.`