在Windowsform C＃面板的自定义位置添加按钮

我已经尝试了好几个小时，但无法正常工作，到目前为止，我必须使用c＃中的面板和按钮来实现二进制搜索树，到目前为止，我所做的是从文本区域输入内容并在其上输入文本值，现在我必须以分层方式显示按钮以制作树。我对可以使用哪些工具来完成任务感到困惑，而我昨天才刚开始使用C＃，对此我并不了解。有关此主题的更多指南将对我有很大帮助。感谢到目前为止，这里的代码！

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {

        string value;
        int z=30;
        int y=100;
        List<Panel> ls = new List<Panel>();
        Button main = new Button();
        public Form1()
        {
            InitializeComponent();
        }

        private void retrieveInput_Click(object sender, EventArgs e)
        {
            value = this.inputText.Text;
            long number1= 0;
            bool canConvert = long.TryParse(value, out number1);
            if (canConvert == true)
            {
                Button button1 = new Button();
               Panel pan = new Panel();
                ls.Add(pan);
                pan.Location = new Point(10, z * 100);
                pan.Size = new Size(200, 90);  // just an example
                this.Controls.Add(pan);
                button1.Click +=(Onb2Click);
                button1.Text = value;
                button1.Width = 100;//this.Width - 10;
                button1.Height = 30;
                pan.Controls.Add(button1);
                pan.Location = new Point(10, z * 100);
                z = z + 30;
                pan.Size = new Size(200, 90);  // just an example
                this.Controls.Add(pan);
                panel1.Controls.Add(pan);

            }
            else
            {
               // Console.WriteLine("numString is not a valid long");

            }   
        }

        private void inputText_TextChanged(object sender, EventArgs e)
        {
            value = this.inputText.Text;
           // retrieveInput_Click(object sender, EventArgs e);

        }

        void Onb2Click(object sender, EventArgs e)
        {

        }

        private void flowLayoutPanel1_Paint(object sender, PaintEventArgs e)
        {
            z++;
            y++;
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {

        }


    }
}