How to set which service is used?

Question

I added two service in Startup.cs as below,

services.AddScoped(typeof(ICacheManager), typeof(RedisCacheManager));
services.AddScoped(typeof(ICacheManager), typeof(InMemoryCacheManager));

However, I couldn't understand which one is used when I construct ICacheManager in a Controller

For example, my HomeController as below:

private readonly ICacheManager _cacheManager;

public HomeController(ICacheManager cacheManager)
{
    _cacheManager = cacheManager;
}

How can I set this?

Serge · Accepted Answer · 2021-12-29T13:49:20.343

you have to follow one of the SOLID principles

The interface segregation principle: "Many client-specific interfaces are better than one general-purpose interface."

or

public interface  IRedisCacheManager: ICacheManager {}

 public class RedisCacheManager: IRedisCacheManager

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