допилила еще модели. это немного, но это честная работа

BeautySalonView/BeautySalonDatabaseImplement/Models/OrderProcedure.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BeautySalonDatabaseImplement.Models
+{
+    public class OrderProcedure
+    {
+        public int Id { get; set; }
+
+        [Required]
+        public int OrderId { get; set; }
+
+        [Required]
+        public int ProcedureId { get; set; }
+
+        [Required]
+        public int OrderProcedureCount { get; set; }
+
+        public virtual Order Order { get; set; } = new();
+
+        public virtual Procedure Procedure { get; set; } = new();
+    }
+}

BeautySalonView/BeautySalonDatabaseImplement/Models/OrderService.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BeautySalonDatabaseImplement.Models
+{
+    public class OrderService
+    {
+        public int Id { get; set; }
+
+        [Required]
+        public int OrderId { get; set; }
+
+        [Required]
+        public int ServiceId { get; set; }
+
+        [Required]
+        public int OrderServiceCount { get; set; }
+
+        public virtual Order Order { get; set; } = new();
+
+        public virtual Service Service { get; set; } = new();
+    }
+}