OrdersDetails.cs

using System.ComponentModel.DataAnnotations;
using System.Collections.Generic;
using System.Linq;

namespace GraphQLAdaptor.Models
{
    public class OrdersDetails
    {
        public static List<OrdersDetails> order = new List<OrdersDetails>();
        public OrdersDetails()
        {

        }
        public OrdersDetails(
        int OrderID, string CustomerId, int EmployeeId, double Freight)
        {
            this.OrderID = OrderID;
            this.CustomerID = CustomerId;
            this.EmployeeID = EmployeeId;
            this.Freight = Freight;
        }

        public static List<OrdersDetails> GetAllRecords()
        {
            if (order.Count() == 0)
            {
                int code = 10000;
                for (int i = 1; i < 10; i++)
                {
                    order.Add(new OrdersDetails(code + 1, "ALFKI", i + 0, 3.3 * i));
                    order.Add(new OrdersDetails(code + 2, "ANATR", i + 2, 4.3 * i));
                    order.Add(new OrdersDetails(code + 3, "ANTON", i + 1, 5.3 * i));
                    order.Add(new OrdersDetails(code + 4, "BLONP", i + 3, 6.3 * i));
                    order.Add(new OrdersDetails(code + 5, "BOLID", i + 4, 7.3 * i));
                    code += 5;
                }
            }
            return order;
        }
        [Key]
        [GraphQLName("OrderID")]
        public int? OrderID { get; set; }
        [GraphQLName("CustomerID")]
        public string? CustomerID { get; set; }
        [GraphQLName("EmployeeID")]
        public int? EmployeeID { get; set; }
        [GraphQLName("Freight")]
        public double? Freight { get; set; }
    }
}