C＃.NET - 未将对象引用设置为对象的实例

Question

我正在尝试创建我的巧克力类的新实例，然后将其放入列表中。当我在控制台中查看newChocolate时，我收到错误：对象引用未设置为对象的实例。我在这里看到了类似的问题，答案似乎总是需要实例化，当我说：Chocolate newChocolate = new Chocolate

时，我想我正在做什么

 Chocolate newChocolate = new Chocolate(comboBoxChocolateSelection.SelectedItem.ToString(), 12.5, true, 2);

 m_model.AddChocolateInList(newChocolate);

我的选择框显示为在控制台中工作，但在查看newChcolate时显示为null。

Console.WriteLine("flavor selected : " + comboBoxChocolateSelection.SelectedItem.ToString()); 

Prints =＆gt;选择的味道：黑暗

Console.WriteLine("newChocolate : " + newChocolate.flavor.ToString());

prints =＆gt; newChocolate。味道为空。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GatesCandy
{
    public class Chocolate
    {
        #region Fields
        public string flavor;
        public double cost;
        public bool giftWrap;
        public int quantity;

        #endregion End of Fields

        #region Constructors 
        public Chocolate(string flavor, double cost, bool giftWrap, int quantity)
        {
            Flavor = flavor;
            Cost = cost;
            GiftWrap = giftWrap;
            Quantity = quantity;
        }
        #endregion End of Constructors

        #region Properties
        public string Flavor { get; set; }
        public double Cost { get; set; }
        public bool GiftWrap { get; set; }
        public int Quantity { get; set; }
        #endregion End Properties


    }
}