DI中Transient Scoped Singleton Instance的区别

Observe which of the OperationId values varies within a request, and between requests.

• Transient objects are always different; a new instance is provided to every controller and every service.
• Scoped objects are the same within a request, but different across different requests
• Singleton objects are the same for every object and every request (regardless of whether an instance is provided in ConfigureServices)