using System;

using System.Collections.Generic;

using Microsoft.EntityFrameworkCore;

​

public class Category

{

    public int Id { get; set; }

    public string  Name { get; set; }

    public string Description { get; set; }

    public ICollection<Product> Products { get; set; }

}

public class Product

{

    public int Id { get; set; }

    public string Name { get; set; }

    public int CategoryId { get; set; }

    public string Description { get; set; }

}

public class ShopContext : DbContext

    {

        public ShopContext(DbContextOptions<ShopContext> options)

            : base(options)

        {

            Database.EnsureCreated();

        }

​

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)

        {

        }

​

        protected override void OnModelCreating(ModelBuilder modelBuilder)

        {

        }

        public DbSet<Category> Categories { get; set; }

        public DbSet<Product> Products { get; set; }

    }

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}