程序代码：

using System.Windows.Forms;
using namespace Test
{
    class Test
    {
        static void Main()
        {
            BindingList<string> list = new BindingList<string>();
            ListBox listBox1 = new ListBox
            {
                DataSource = list,
                Dock = DockStyle.Left
            };

            ListBox listBox2 = new ListBox
            {
                DataSource = list,
                Dock = DockStyle.Right
            };

            foreach (var lb in new[] { listBox1, listBox2 })
            {
                lb.KeyDown += (s, a) =>
                    {
                        if (a.KeyCode == Keys.Delete)
                        {
                            list.Remove((s as ListBox).SelectedItem as string);
                        }
                    };
            }

            TextBox input = new TextBox
                {
                    Dock = DockStyle.Top
                };
            input.KeyDown += (s, a) =>
                {
                    if (a.KeyCode == Keys.Enter)
                    {
                        list.Add(input.Text);
                    }
                };

            Form form = new Form();
            form.Controls.Add(input);
            form.Controls.Add(listBox1);
            form.Controls.Add(listBox2);

            Application.Run(form);
        }
    }
}