EF CoreでCode Firest multipl prymarykey

EF 6とかだとアノテーションでこうできたけど

Model.cs

        [Key, Column(Order = 0) ]
        public int AId { get; set; }
        [Key, Column(Order = 1) ]
        public int BId { get; set; }
        [Key, Column(Order = 2) ]
        public int CId { get; set; }

EFCoreはこう

DbContext.cs

            builder.Entity<Model>().HasKey(p => new {p.AId, p.BId, p.CId});