Use ServiceStack.Redis

_init

dotnet add package ServiceStack.Redis

Configure.Redis.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using ServiceStack;
using ServiceStack.Redis;

namespace MyApp
{
    public class ConfigureRedis : IConfigureServices, IConfigureAppHost
    {
        IConfiguration Configuration { get; }
        public ConfigureRedis(IConfiguration configuration) => Configuration = configuration;

        public void Configure(IServiceCollection services)
        {
            services.AddSingleton<IRedisClientsManager>(
                new RedisManagerPool(Configuration.GetConnectionString("Redis") ?? "localhost:6379"));
        }

        public void Configure(IAppHost appHost)
        {
            appHost.GetPlugin<SharpPagesFeature>()?.ScriptMethods.Add(new RedisScripts());
        }
    }    
}