Link table with the names of the linked entities

ABDbContext.cs

public class ABDbContext : DbContext
{
    public DbSet<ClassA> ClassAs { get; set; }
    public DbSet<ClassB> ClassBs { get; set; }
    public DbSet<ABLink> ABLinks { get; set; }
    
    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        // Custom many-to-many, see: https://dev.to/shibayan/tried-entity-framework-core-5-0-s-many-to-many-support-4och
        modelBuilder
            .Entity<ClassA>()
            .HasMany(a => a.ClassBs)
            .WithMany(b => b.ClassAs)
            .UsingEntity<ABLink>
            (
                link => link.HasOne(l => l.ClassA).WithMany(),
                link => link.HasOne(l => l.ClassB).WithMany()
            )
            .HasKey(link => link.LinkId);
    }
    /* ... */
}

ABLink.cs

public class ABLink
{
    public int LinkId { get; set; }
    
    public int AId { get; set; }
    public ClassA ClassA { get; set; }

    public int BId { get; set; }
    public ClassB ClassB { get; set; }
}

ClassA.cs

public class ClassA
{
    public int AId { get; set; }
    public string AName { get; set; }
    
    // Many to many
    public List<ClassB> ClassBs { get; set; }
}

ClassB.cs

public class ClassB
{
    public int BId { get; set; }
    public string BName { get; set; }
    
    // Many to many
    public List<ClassA> ClassAs { get; set; }
}