<PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="11.0.0-rc.3.26522.148" />

Microsoft.Extensions.DependencyInjection.ServiceLifetime

public enum ServiceLifetime
Specifies the lifetime of a service in an IServiceCollection.
namespace Microsoft.Extensions.DependencyInjection { public enum ServiceLifetime { Singleton, Scoped, Transient } }