Custom widget modification icon

Namespace System. Windows. Forms. Controls
{
[ToolboxBitmap (typeof (LoginBox), "Resources.LoginBox.bmp")]
Public class LoginBox: UserControl
{
}
}

You can find ToolboxBitmap on the Internet. Here I just want to emphasize some of my problems.

1. Why is the icon or gear used to generate a solution?

There is no way to do this. The experiment will not change. After the generated dll is dragged into the toolbox, the icon will change.

2. After the namespace is modified, the icon is not displayed.

I am very proud of this. Later I found that the namespace of the embedded resource file is different from the namespace you changed, so it cannot be referenced.

The specific solution is to right-click the project and convert the default namespace into the one you want to use.

Some other common problems are solved on the Internet. These two problems have fewer answers on the Internet.