在面板上移动多个矩形。有可能吗？

Question

我希望能够移动在运行时创建的矩形。因为它们不是控件，所以我不确定如何让它们移动。用户输入他们想要的矩形（热点）的数量，然后当他们点击button2时，他们被绘制到panel2上。

我的代码应该允许我在面板之间移动其他控件（按钮等），但我只能在创建控件的面板上拖放。

如果您能解决这两个问题，我将不胜感激

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 WindowsFormsApplication4
{
    public partial class Form1 : Form
    {

        Rectangle[] hotspotArray = new Rectangle[0];
        List<Rectangle> hotspotList = new List<Rectangle>();

        private Rectangle rec;
        private Point MouseDownLocation;

        public Form1()
        {
            InitializeComponent();
            this.DoubleBuffered = true;

            panel1.AllowDrop = true;
            panel2.AllowDrop = true;

            panel1.DragEnter += new DragEventHandler(panel1_DragEnter);
            panel1.DragDrop += new DragEventHandler(panel1_DragDrop);
            panel1.DragOver += new DragEventHandler(panel1_DragOver);

            panel2.DragEnter += new DragEventHandler(panel1_DragEnter);
            panel2.DragDrop += new DragEventHandler(panel1_DragDrop);
            panel2.DragOver += new DragEventHandler(panel1_DragOver);

            numericUpDown1.ValueChanged += new EventHandler(numericUpDown1_ValueChanged);

        }
        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                OpenFileDialog myFile = new OpenFileDialog();
                myFile.Filter = "Image Files(*.img, *.bmp) |*.img; *.bmp;";

                if (myFile.ShowDialog() == DialogResult.OK)
                {
                    panel2.BackgroundImage = Image.FromFile(myFile.FileName);
                }
            }
            catch (Exception error)
            {
                MessageBox.Show("Error loading the selected file.  Original error: " + error.Message);
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (numericUpDown1.Value != 0)
            {

                int num = (int)numericUpDown1.Value;

                createNewRectangles(num);

            }
        }
        private void Control_MouseDown(object sender, MouseEventArgs e)
        {
            Control c = sender as Control;
            c.DoDragDrop(c, DragDropEffects.All);
        }


        void panel1_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.All;
        }

        void panel1_DragDrop(object sender, DragEventArgs e)
        {
            Control c = sender as Control;
            c = (Button)e.Data.GetData(typeof(Button));

            if (c != null)
            {
                c.Location = new Point(e.X, e.Y);
            }
        }

        void panel1_DragOver(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.All;
        }

        private void numericUpDown1_ValueChanged(object sender, EventArgs e)
        {


        }

        private void panel2_Paint(object sender, PaintEventArgs e)
        {

        }

        public void createNewRectangles(int numRecs)
        {
            Point recLoc = new Point(10, 10);
            Pen p = new Pen(Color.Red);

            for (int loop = 0; loop < numericUpDown1.Value; loop++)
            {
                rec = new Rectangle(100, 100, 100, 100);
                rec.Location = recLoc;
                hotspotList.Add(rec);



                recLoc.X = recLoc.X + 10;
                recLoc.Y = recLoc.Y + 10;
            }

            hotspotArray = hotspotList.ToArray();
            panel2.CreateGraphics().DrawRectangles(p, hotspotArray);
            Invalidate();
        }

        protected override void OnMouseMove(MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                rec.Location = new Point((e.X - MouseDownLocation.X) + rec.Left, (e.Y - MouseDownLocation.Y) + rec.Top);
                MouseDownLocation = e.Location;

            }
        }

        protected override void OnMouseDown(MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                MouseDownLocation = e.Location;
            }
            rec.Location = MouseDownLocation;

        }
    }
}