add-redis.cs

public static IServiceCollection AddRedis(this IServiceCollection services, IConfiguration configuration)
{
    var redisCacheSettings = new RedisOptions();
    configuration.GetSection(SectionName).Bind(redisCacheSettings);
    services.AddSingleton(redisCacheSettings);

    if (!redisCacheSettings.Enabled)
    {
        return services;
    }

    services.AddSingleton<IConnectionMultiplexer>(_ => ConnectionMultiplexer.Connect(redisCacheSettings.ConnectionString));
    services.AddStackExchangeRedisCache(options => options.Configuration = redisCacheSettings.ConnectionString);
    services.AddSingleton<IResponseCacheService, ResponseCacheService>();

    return services;
}