Dependency Injection - register multiple implementations of the same Interface

In the DI section I found your comment Note: example 2 is forthcoming. The inspiration has not arrived yet.

Is this good enough for an example? I can make an example and PR something like this:

services.AddScoped<IStrategy, StrategyA>();
services.AddScoped<IStrategy, StrategyB>();

...

public interface IStrategy { }
public class StrategyA : IStrategy { }
public class StrategyB : IStrategy { }
...

public IStrategy LastRegisteredStrategy { get; }
public IEnumerable<IStrategy> Strategies { get; }

public ValuesController(IStrategy lastRegisteredStrategy, IEnumerable<IStrategy> strategies)
{
    LastRegisteredStrategy = lastRegisteredStrategy;
    Strategies = strategies;
     var strategyA = Strategies.FirstOrDefault(x => x.GetType() == typeof(StrategyA));
     var strategyB = Strategies.FirstOrDefault(x => x.GetType() == typeof(StrategyB));

     if (strategyB.GetType() == LastRegisteredStrategy.GetType())
     { 
         //log 
      }
}

[dodyg]

I modified middleware-9 to demonstrate injection at Invoke as well (https://github.com/dodyg/practical-aspnetcore/commit/e852ef3bd385ab1a0b885ef2e39d12bb2b9bc875)

[dodyg]

Nice.

@Tratcher https://github.com/dodyg/practical-aspnetcore/blob/master/projects/middleware-9/src/Program.cs shows construction injection service. It should be modified to show injection at the Invoke method as well.