View difference between Paste ID: VU8tjVKK and HxwhQMmh

 public class MyYobaContext : DbContext, IMyYobaContext {
 	public DbSet<SmallYoba> { get; set; }
 	public DbSet<BigYoba> { get; set; }
     public DbSet<SmallBigYoba> { get; set; }
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
         modelBuilder.Entity<SmallBigYoba>()
            .HasKey(option => new { option.SmallYobaId, option.BigYobaId });
             base.OnModelCreating(modelBuilder);
 		base.OnModelCreating(modelBuilder);
     }
 }
 
 public class SmallBigYoba {
 	public int SmallYobaId { get; set; }
 	public SmallYoba SmallYoba { get; set; }
 
 	public int BigYobaId { get; set; }
 	public BigYoba BigYoba { get; set; }
 }
 
 public class BigYoba {
 	...
 	ICollection<SmallBigYoba> ManyToManyYoba { get; set; }
 	...
 }
 
 public class SmallYoba {
 	...
 	ICollection<SmallBigYoba> ManyToManyYoba { get; set; }
 	...
 }