A custom tool(circle button) that is created by a class does not appear in toolbox after rebuild (VS 2022)

[Programmable Physics]

I was trying to create a round button. For this, we need to create a class, here is the code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

namespace CircularButton
{
    internal class CircularButton :Button
    {
        protected override void OnPaint(PaintEventArgs pevent)
        {
            GraphicsPath g = new GraphicsPath();
            g.AddEllipse(0, 0, ClientSize.Width, ClientSize.Height);
            this.Region = new System.Drawing.Region(g);
            base.OnPaint(pevent);
        }
    }
}

After creating and coding this class, we need to rebuild the solution, after rebuilding, we must see the new CİRCLE BUTTON tool in the TOOLBOX:

However, I do not get neither this circule button option nor the "applicationName Components" tab:

I do not have both. How can I solve this problem?


Source of the images I use is this video:

 

[JohnH]

internal class CircularButton

Change to public class, then rebuild (possibly Clean Solution first, then Rebuild solution) and reopen designer for a form. It should now appear in toolbox.

 

[JohnH]

About graphics code:

• GraphicsPath should be disposed in that code block, after it has been used to the create the new Region object.
• If Region property is not null it should be disposed before you assign a new Region object.

 

[Skydiver]

Also... Are you sure that you want to keep or creating a new region every time your button is painted? You should only do that whenever the width and/or height has changed.