HostAbortedException The exception that is thrown when an is stopped to indicate the Host is stopping gracefully. This exception should not be thrown or handled by user code.

 HostBuilderContext Context containing the common services on the . Some properties may be null until set by the .

 EnvironmentName Commonly used environment names. This type is obsolete and will be removed in a future version. The recommended alternative is Microsoft.Extensions.Hosting.Environments.

 Environments Commonly used environment names.

 HostDefaults Constants for HostBuilder configuration keys.

 HostEnvironmentEnvExtensions Extension methods for .

 HostingAbstractionsHostBuilderExtensions Provides extension methods for the from the hosting abstractions package.

 HostingAbstractionsHostExtensions Provides extension methods for the from the hosting abstractions package.

 HostingEnvironmentExtensions Extension methods for .

 BackgroundService Base class for implementing a long running .

 IApplicationLifetime Allows consumers to perform cleanup during a graceful shutdown. This type is obsolete and will be removed in a future version. The recommended alternative is Microsoft.Extensions.Hosting.IHostApplicationLifetime.

 IHost A program abstraction.

 IHostApplicationBuilder Represents a hosted applications and services builder which helps manage configuration, logging, lifetime, and more.

 IHostApplicationLifetime Allows consumers to be notified of application lifetime events. This interface is not intended to be user-replaceable.

 IHostBuilder A program initialization abstraction.

 IHostedLifecycleService Defines methods that are run before or after and .

 IHostedService Defines methods for objects that are managed by the host.

 IHostEnvironment Provides information about the hosting environment an application is running in.

 IHostingEnvironment Provides information about the hosting environment an application is running in. This type is obsolete and will be removed in a future version. The recommended alternative is Microsoft.Extensions.Hosting.IHostEnvironment.

 IHostLifetime Tracks host lifetime.