IDesigner.cs

using System.Runtime.InteropServices;

namespace System.ComponentModel.Design
{
    [ComVisible(true)]
    public interface IDesigner : IDisposable
    {
        IComponent Component
        {
            get;
        }

        DesignerVerbCollection Verbs
        {
            get;
        }

        void DoDefaultAction();

        void Initialize(IComponent component);
    }
}