Program.cs

using Microsoft.OpenApi.Models;

using PizzaStore.Models;
using System.Net.NetworkInformation;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Http.HttpResults;

var builder = WebApplication.CreateBuilder(args);
//Adding sqlLite to persist data
string connectionString = builder.Configuration.GetConnectionString("Pizzas") ?? "Data Source=Pizzas.db";
builder.Services.AddEndpointsApiExplorer();
// adding the context to the in memory database
// this configure the context class 
builder.Services.AddSqlite<PizzaDb>(connectionString);
builder.Services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new OpenApiInfo { Title = "PizzaStore API", Description = "Making the Pizzas you love", Version = "v1" });
});

var app = builder.Build();
app.UseSwagger();
app.UseSwaggerUI(c =>
{
    c.SwaggerEndpoint("/swagger/v1/swagger.json", "PizzaStore API V1");
});

app.MapGet("/", (PizzaDb db) => db.Pizzas);
app.MapGet("/pizzas", async (PizzaDb db) => await db.Pizzas.ToListAsync());
app.MapGet("/pizza/{id}", async (PizzaDb db, int id) => await db.Pizzas.FindAsync(id));
app.MapPut("/pizza/{id}", async (PizzaDb db, Pizza updatePizza, int id) => {
    var pizza = await db.Pizzas.FindAsync(id);
    if (pizza is null)
        return Results.NotFound();
    pizza.Description = updatePizza.Description;
    pizza.Name = updatePizza.Name;
    await db.SaveChangesAsync();
    return Results.NoContent();
});

app.MapPost("/pizza", async (PizzaDb db, Pizza pizza) =>
{
    await db.Pizzas.AddAsync(pizza);
    await db.SaveChangesAsync();
    return Results.Created($"/pizza/{pizza.Id}", pizza);
}
);
app.MapDelete("/pizza/{id}", async (PizzaDb db, int id) => {
    var pizza = await db.Pizzas.FindAsync(id);
    if (pizza is null)
        return Results.NotFound();
    db.Pizzas.Remove(pizza);
    await db.SaveChangesAsync();
    return Results.NoContent();
});

app.Run();