Store data. Talk to things. Run work in the background.

using Birko.Data.Models;
using Birko.Data.SQL.Attributes;

[Table("Products")]
public class Product : AbstractDatabaseModel
{
    [MaxLengthField(200)]
    public string Name { get; set; } = string.Empty;

    [PrecisionField(18), ScaleField(2)]
    public decimal Price { get; set; }
}

// AbstractDatabaseModel gives you a Guid primary key.
// Precision and scale are separate attributes — use both,
// or decimals come back as whole numbers.

using Birko.Data.SQL.SqLite.Stores;

var store = new SQLiteStore<Product>();
store.SetSettings(new SqLiteSettings(@"C:\data", "shop.db"));

// create
var id = store.Create(new Product { Name = "Widget", Price = 9.99m });

// read one
var product = store.Read(id);

// query — filter, orderBy, limit, offset
var cheap = store.Read(x => x.Price < 10m, null, null, null);

// update
product!.Price = 12.50m;
store.Update(product);

// count and delete
var total = store.Count();
store.Delete(product);

// Same model, same calls. Only construction changes.

using Birko.Data.InMemory.Stores;

var store = new InMemoryStore<Product>();
// no settings needed — the recommended test double

// …or MongoDB
using Birko.Data.MongoDB.Stores;

var store = new MongoDBStore<Product>();
store.SetSettings(settings);

// Create / Read / Update / Delete / Count are identical
// from here on. That is the point of the store API.