Untitled

  private List<CakeLayer> cakeLayers = new List<CakeLayer>();

        public Form1()
        {
            InitializeComponent();
            this.Paint += new PaintEventHandler(this.Form1_Paint);
            this.Load += new EventHandler(this.Form1_Load);
            this.btnAddLayer.Click += new EventHandler(this.BtnAddLayer_Click);
            this.btnRemoveLayer.Click += new EventHandler(this.BtnRemoveLayer_Click);
            this.btnChooseColor.Click += new EventHandler(this.BtnChooseColor_Click);
            this.lstLayers.SelectedIndexChanged += new EventHandler(this.LstLayers_SelectedIndexChanged);
            this.numLayerHeight.ValueChanged += new EventHandler(this.LayerPropertiesChanged);
            this.numLayerWidth.ValueChanged += new EventHandler(this.LayerPropertiesChanged);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // Predefine some cake layers
            cakeLayers.Add(new CakeLayer(50, 200, Color.Pink));
            cakeLayers.Add(new CakeLayer(40, 180, Color.LightBlue));
            cakeLayers.Add(new CakeLayer(30, 160, Color.LightGreen));

            // Populate the list box
            UpdateLayerList();
            cakePanel.Invalidate(); // Force the panel to redraw with the initial layers
        }

        private void UpdateLayerList()
        {
            lstLayers.Items.Clear();
            for (int i = 0; i < cakeLayers.Count; i++)
            {
                lstLayers.Items.Add($"Layer {i + 1}");
            }
        }

        private void BtnAddLayer_Click(object sender, EventArgs e)
        {
            CakeLayer newLayer = new CakeLayer((int)numLayerHeight.Value, (int)numLayerWidth.Value, Color.Pink);
            cakeLayers.Add(newLayer);
            UpdateLayerList();
            lstLayers.SelectedIndex = lstLayers.Items.Count - 1; // Select the new layer
            cakePanel.Invalidate();
        }

        private void BtnRemoveLayer_Click(object sender, EventArgs e)
        {
            if (lstLayers.SelectedIndex >= 0)
            {
                cakeLayers.RemoveAt(lstLayers.SelectedIndex);
                UpdateLayerList();
                cakePanel.Invalidate();
            }
        }

        private void BtnChooseColor_Click(object sender, EventArgs e)
        {
            if (lstLayers.SelectedIndex >= 0 && colorDialog.ShowDialog() == DialogResult.OK)
            {
                cakeLayers[lstLayers.SelectedIndex].Color = colorDialog.Color;
                cakePanel.Invalidate();
            }
        }

        private void LstLayers_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (lstLayers.SelectedIndex >= 0)
            {
                CakeLayer selectedLayer = cakeLayers[lstLayers.SelectedIndex];
                numLayerHeight.Value = selectedLayer.Height;
                numLayerWidth.Value = selectedLayer.Width;
            }
        }

        private void LayerPropertiesChanged(object sender, EventArgs e)
        {
            if (lstLayers.SelectedIndex >= 0)
            {
                CakeLayer selectedLayer = cakeLayers[lstLayers.SelectedIndex];
                selectedLayer.Height = (int)numLayerHeight.Value;
                selectedLayer.Width = (int)numLayerWidth.Value;
                cakePanel.Invalidate();
            }
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            int yPosition = cakePanel.Height;

            foreach (var layer in cakeLayers)
            {
                yPosition -= layer.Height;
                Rectangle layerRect = new Rectangle((cakePanel.Width - layer.Width) / 2, yPosition, layer.Width, layer.Height);
                g.FillRectangle(new SolidBrush(layer.Color), layerRect);
                g.DrawRectangle(Pens.Brown, layerRect);
            }
        }
    }
}