ServiceProvider.GetService 为瞬态实例工厂中的作用域服务返回相同的实例

Question

In asp.net core 3.1 project, I have the following controller (ctor):

public MyController(IMyService myService) { }

The IMyService interface and MyService

public interface IMyService { }

public class MyService : IMyService { }

Where the IService is registered in my Startup.cs as follows:

services.AddScoped<MyService>();
services.AddTransient(sp =>
                      {
                          var service = sp.GetRequiredService<MyService>();
                          // do something on the service...
                          return service as IMyService;
                      });

However, when I'm doing multiple requests, I see that only the first request is initiating a new instance of the MyService (ie, when I'm putting a breakpoint in the MyService constructor, it will break only on the first request).

The thing that bugs me the most, is that if I'm changing the services.AddTransient(sp => ... line in the Startup.cs file to services.AddScoped(sp => ... - everything works and the instance is initiated every request.

How can I fix the issue so when I'm getting services inside the instance factory, it will be gathered by the correct scope of the request?

Answer 1

Following @GuruStron comment, I found out that I have the following line in my Program.cs , although I'm not really using Unity container in my project:

.UseUnityServiceProvider()

after I removed this line, everything works as expected.