// Attribute without any parameter inject service as scoped
// and implementation type will be interface name without "I" prefix.
[Injectable]
public interface IUserService { }

public class UserService : IUserService { }

// You can specify service lifetime.
[Injectable(Lifetime.Singleton)]
public interface IProductService { }

public class ProductService : IProductService { }

// You can specify implementation type.
[Injectable(typeof(ConsoleLogger),Lifetime.Transient)]
public interface ICustomLogger { }

public class ConsoleLogger : ICustomLogger { }

// Attribute without any parameter inject service as scoped
// and implementation type will be interface name without "I" prefix.
[InjectAsSingleton]
public interface ISingletonService { }

public class SingletonService : ISingletonService { }

// You can specify implementation type.
[InjectAsScoped(typeof(ScopedServiceV2))]
public interface IScopedService { }

public class ScopedServiceV2 : IScopedService { }

[InjectAsTransient]
public interface ITransientService { }

public class TransientService : ITransientService { }

[InjectAsSingleton]
public class DummyStorage
{
    public string GetDummyText() => "Some Dummy Text";
}

[Configure] // or [Configure("CustomSectionName")]
public class Options
{
    public string Url { get; set; }
    public int Port { get; set; }
    public string UserName { get; set; }
    public string Password { get; set; }
}

public class WhereOptionsAreInjected
{
    private readonly Test _test;
    private readonly Test _testAsOptionsValue;
    private readonly Test _testAsOptionsSnapshotValue;
    public WhereOptionsAreInjected(Test test,IOptions<Test> testOptions,
            IOptionsSnapshot<Test> testOptionsSnapshot)
    {
        _test = test;
        _testAsOptionsValue = testOptions.Value;
        _testAsOptionsSnapshotValue = testOptionsSnapshot.Value;
    }
}

using Netjection

public void ConfigureServices(IServiceCollection services)
{
    services.InjectServices(Assembly.GetExecutingAssembly(),Assembly.GetAssembly(typeof(SingletonService)));
}