Can you explain the concept of Code First and how it is applied in database development?

The Code First concept is used in ORM (e.g., Entity Framework) and assumes that the developer first writes classes and data models in a programming language (e.g., C#), and then the database structure is automatically created based on these classes.

Application of Code First:

• You describe entities (classes) and their properties.
• Define relationships between entities through navigation properties.
• Use migrations to create and update the database schema.

Example:

public class Product
{
    public int Id { get; set; }
    public string Name { get; set; }
    public decimal Price { get; set; }
}

public class AppDbContext : DbContext
{
    public DbSet<Product> Products { get; set; }
}

After that, migrations create a Products table in the database with columns Id, Name, and Price.

Thus, Code First allows managing the database through code, simplifying synchronization between the model and the schema.