Understanding many-to-many relationships

A many-to-many relationship is when an entity can be associated with multiple entities and vice versa. For example, a movie can have many actors, and an actor can act in many movies; a post can have many tags, and a tag can have many posts; a student can enroll in many courses, and a course can have many students, and so on. In this section, we will introduce how to configure a many-to-many relationship in EF Core.

Many-to-many configuration

In a many-to-many relationship, we need to define a collection navigation property on both sides. Here is an example of a many-to-many relationship between a Movie entity and an Actor entity:

public class Movie{
    public Guid Id { get; set; }
    public string Title { get; set; } = string.Empty;
    public string? Description { get; set; }
    public int ReleaseYear { get; set; }
    public List...