Winform Designer generated name bug with custom control

Question

Using Visual Studio 2019, I get a bug with a custom control, the following Numeric Up Down:

namespace usbACQ_ProdConf
{
    public partial class usbACQ_ProdConf : Form
    {
        public class MyNumericUpDown : NumericUpDown
        {
            protected override void UpdateEditText()
            {
                Text = ((uint)Value).ToString("X4");
            }

        }
    }
}

Every time I edit the design, an error gets generated in the designer because it adds a parasite .usbACQ_ProdConf :

What is generated:

private void InitializeComponent()
{
        this.nUD_usbPID = new usbACQ_ProdConf.usbACQ_ProdConf.MyNumericUpDown();

What I have to edit every time:

private void InitializeComponent()
{
        this.nUD_usbPID = new usbACQ_ProdConf.MyNumericUpDown();

Does anyone know how to fix this annoying bug?

Answer 1

Thanks to @Jimi,
I renamed the namespace and put the custom control class outside of the other class. It works now and the name is just MyNumericUpDown