using Microsoft.AspNetCore.SignalR;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddKeyedSingleton<ICache, BigCache>("big");
builder.Services.AddKeyedSingleton<ICache, SmallCache>("small");

builder.Services.AddRazorPages();
builder.Services.AddSignalR();

var app = builder.Build();

app.MapRazorPages();
app.MapHub<MyHub>("/myHub");

app.Run();

public interface ICache
{
    object Get(string key);
}
public class BigCache : ICache
{
    public object Get(string key) => $"Resolving {key} from big cache.";
}

public class SmallCache : ICache
{
    public object Get(string key) => $"Resolving {key} from small cache.";
}

public class MyHub : Hub
{
    public void SmallCacheMethod([FromKeyedServices("small")] ICache cache)
    {
        Console.WriteLine(cache.Get("signalr"));
    }

    public void BigCacheMethod([FromKeyedServices("big")] ICache cache)
    {
        Console.WriteLine(cache.Get("signalr"));
    }
}