Microsoft.Extensions.DependencyInjection.AutoActivation (10.8.0)
Published 2026-09-09 02:39:29 +03:30 by kayer
Installation
dotnet nuget add source --name kayer --username your_username --password your_token dotnet add package --source kayer --version 10.8.0 Microsoft.Extensions.DependencyInjection.AutoActivationAbout this package
Extensions to auto-activate registered singletons in the dependency injection system.
Microsoft.Extensions.DependencyInjection.AutoActivation
This provides the ability to instantiate registered singletons during startup instead of during the first time it is used.
A singleton is typically created when it is first used, which can lead to higher than usual latency in responding to incoming requests. Creating the instances on startup helps prevent the service from exceeding its SLA for the first set of requests it processes.
Install the package
From the command-line:
dotnet add package Microsoft.Extensions.DependencyInjection.AutoActivation
Or directly in the C# project file:
<ItemGroup>
<PackageReference Include="Microsoft.Extensions.DependencyInjection.AutoActivation" Version="[CURRENTVERSION]" />
</ItemGroup>
Usage Example
Registering Services
The services to auto-activate can be registered using the following methods:
public static IServiceCollection ActivateSingleton<TService>(this IServiceCollection services)
public static IServiceCollection ActivateSingleton(this IServiceCollection services, Type serviceType)
public static IServiceCollection AddActivatedSingleton<TService, TImplementation>(this IServiceCollection services, Func<IServiceProvider, TImplementation> implementationFactory)
public static IServiceCollection AddActivatedSingleton<TService, TImplementation>(this IServiceCollection services)
public static IServiceCollection AddActivatedSingleton<TService>(this IServiceCollection services, Func<IServiceProvider, TService> implementationFactory)
public static IServiceCollection AddActivatedSingleton<TService>(this IServiceCollection services)
public static IServiceCollection AddActivatedSingleton(this IServiceCollection services, Type serviceType)
public static IServiceCollection AddActivatedSingleton(this IServiceCollection services, Type serviceType, Func<IServiceProvider, object> implementationFactory)
public static IServiceCollection AddActivatedSingleton(this IServiceCollection services, Type serviceType, Type implementationType)
public static void TryAddActivatedSingleton(this IServiceCollection services, Type serviceType)
public static void TryAddActivatedSingleton(this IServiceCollection services, Type serviceType, Type implementationType)
public static void TryAddActivatedSingleton(this IServiceCollection services, Type serviceType, Func<IServiceProvider, object> implementationFactory)
public static void TryAddActivatedSingleton<TService>(this IServiceCollection services)
public static void TryAddActivatedSingleton<TService, TImplementation>(this IServiceCollection services)
public static void TryAddActivatedSingleton<TService>(this IServiceCollection services, Func<IServiceProvider, TService> implementationFactory)
public static IServiceCollection ActivateKeyedSingleton<TService>(this IServiceCollection services, object? serviceKey)
public static IServiceCollection ActivateKeyedSingleton(this IServiceCollection services, Type serviceType, object? serviceKey)
public static IServiceCollection AddActivatedKeyedSingleton<TService, TImplementation>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TImplementation> implementationFactory)
public static IServiceCollection AddActivatedKeyedSingleton<TService, TImplementation>(this IServiceCollection services, object? serviceKey)
public static IServiceCollection AddActivatedKeyedSingleton<TService>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory)
public static IServiceCollection AddActivatedKeyedSingleton<TService>(this IServiceCollection services, object? serviceKey)
public static IServiceCollection AddActivatedKeyedSingleton(this IServiceCollection services, Type serviceType, object? serviceKey)
public static IServiceCollection AddActivatedKeyedSingleton(this IServiceCollection services, Type serviceType, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
public static IServiceCollection AddActivatedKeyedSingleton(this IServiceCollection services, Type serviceType, object? serviceKey, Type implementationType)
public static void TryAddActivatedKeyedSingleton(this IServiceCollection services, Type serviceType, object? serviceKey)
public static void TryAddActivatedKeyedSingleton(this IServiceCollection services, Type serviceType, object? serviceKey, Type implementationType)
public static void TryAddActivatedKeyedSingleton(this IServiceCollection services, Type serviceType, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
public static void TryAddActivatedKeyedSingleton<TService>(this IServiceCollection services, object? serviceKey)
public static void TryAddActivatedKeyedSingleton<TService, TImplementation>(this IServiceCollection services, object? serviceKey)
public static void TryAddActivatedKeyedSingleton<TService>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory)
For example:
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddActivatedSingleton<MyService>();
var app = builder.Build();
app.Run();
public class MyService
{
public MyService()
{
Console.WriteLine("MyService is created");
}
}
Result:
MyService is created
info: Microsoft.Hosting.Lifetime[14]
Now listening on: http://localhost:5297
info: Microsoft.Hosting.Lifetime[0]
Application started. Press Ctrl+C to shut down.
Services that are already registered can also be auto-activated:
builder.Services.AddSingleton<OtherService>();
// ...
builder.Services.ActivateSingleton<OtherService>();
Feedback & Contributing
We welcome feedback and contributions in our GitHub repo.