如何实现自定义Windows窗体设计器？

using System.Windows.Forms.Design;

public class CustomDesigner : ControlDesigner
{
    public override void Initialize(IComponent component)
    {
        base.Initialize(component);
        // 在此处添加自定义设计器的初始化代码
    }

    public override void OnDragDrop(DragEventArgs de)
    {
        base.OnDragDrop(de);
        // 在此处添加自定义设计器的拖放处理代码
    }
}

public CustomDesigner CustomDesignerInstance
{
    get { return (CustomDesigner)Designer; }
}

public Form1()
{
    InitializeComponent();
    this.Designer = new CustomDesigner();
}