Use RavenDB

_init

dotnet add package RavenDB.Client

Configure.RavenDb.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using ServiceStack;
using ServiceStack.DataAnnotations;
using Raven.Client.Documents;

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

        public void Configure(IServiceCollection services)
        {
            var store = new DocumentStore
            {
                Urls = new[]                        // URL to the Server, or list of URLs to all Cluster Servers (Nodes)
                {                                   
                    Configuration.GetConnectionString("RavenDB") ?? "http://localhost:8080"         
                },
                Database = "MyApp",                 // Default database that DocumentStore will interact with
                Conventions = { }                   // DocumentStore customizations
            };

            store.Conventions.FindIdentityProperty = p => {
                var attr = p.DeclaringType.FirstAttribute<IndexAttribute>(); // Allow overriding 'Id' Identity property
                return attr != null
                    ? p.Name == attr.Name
                    : p.Name == "Id";
            };
            
            services.AddSingleton<IDocumentStore>(store.Initialize());
        }
    }    
}