Winforms c#列表框不显示列表内容

我有一个winforms应用程序，我试图使用MVC编程

在designer.cs的形式我有:

    this.listBox_regApps = new System.Windows.Forms.ListBox();
    this.listBox_regApps.Anchor = System.Windows.Forms.AnchorStyles.Top;
    this.listBox_regApps.FormattingEnabled = true;
    this.listBox_regApps.Location = new System.Drawing.Point(62, 115);
    this.listBox_regApps.Name = "listBox_regApps";
    this.listBox_regApps.Size = new System.Drawing.Size(351, 134);
    this.listBox_regApps.TabIndex = 1;

然后在正常的cs文件中，我尝试将列表框数据设置为列表(应用程序)。当我调试列表时，应用程序确实有数据，但它从未出现在表单中。不知道为什么。我试过添加。update和。refresh，但这两个都不起作用。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace AppCompatDemo1
{
    interface IAppView
    {
        void AddListener(IController controller);
    };

    public partial class AppCompatApp : Form, IAppView
    {
        IController controller;
        public AppCompatApp()
        {
            InitializeComponent();
        }
        public void AddListener(IController controller)
        {
            this.controller = controller;
        }
        //Trying to set my listbox to display this list
        public void SetApps(List<string> apps)
        {
            listBox_regApps.DataSource = apps;
        }


    }
    public interface IController
    {
        void OnTestClick(string currentApp);
    }
    class AppController : IController
    {
        AppCompatApp view;
        IAppModel model;
        public AppController(IAppModel model, AppCompatApp view)
        {
            this.model = model;
            this.view = view;
            this.view.AddListener(this);
            view.SetApps(model.getApps());
        }
    }
    interface IAppModel
    {
        List<string> getApps();
    }
    class AppModel : IAppModel
    {
        List<string> apps;
        public AppModel()
        {
            apps = new List<string>();
            apps.Add("app1");
            apps.Add("app2");
            apps.Add("app3");
        }
        public List<string> getApps()
        {
            return apps;
        }
    }
}

foreach (string app in apps)
{
    listBox_regApps.Items.Add(app);
}