EF Core删除多对多关系中的数据

// 定义实体类
public class A
{
    public int Id { get; set; }
    public string Name { get; set; }
    public ICollection<C> Cs { get; set; }
}

public class B
{
    public int Id { get; set; }
    public string Name { get; set; }
    public ICollection<C> Cs { get; set; }
}

public class C
{
    public int AId { get; set; }
    public int BId { get; set; }
    public A A { get; set; }
    public B B { get; set; }
}

// 配置关系
public class MyDbContext : DbContext
{
    public DbSet<A> As { get; set; }
    public DbSet<B> Bs { get; set; }
    public DbSet<C> Cs { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<C>()
            .HasKey(c => new { c.AId, c.BId });

        modelBuilder.Entity<C>()
            .HasOne(c => c.A)
            .WithMany(a => a.Cs)
            .HasForeignKey(c => c.AId);

        modelBuilder.Entity<C>()
            .HasOne(c => c.B)
            .WithMany(b => b.Cs)
            .HasForeignKey(c => c.BId);
    }
}

// 删除多对多关系中的数据
using (var context = new MyDbContext())
{
    var relationData = context.Cs.Where(c => c.AId == 1 && c.BId == 2).ToList();
    context.Cs.RemoveRange(relationData);
    context.SaveChanges();
}