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

Question

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?

Answer 1

I think CircularButton should be a public but not internal class.