namespace System.ComponentModel { public class ToolboxItemAttribute : Attribute { public static readonly ToolboxItemAttribute Default; public static readonly ToolboxItemAttribute None; public Type ToolboxItemType { get; } public string ToolboxItemTypeName { get; } public ToolboxItemAttribute(bool defaultType); public ToolboxItemAttribute(string toolboxItemTypeName); public ToolboxItemAttribute(Type toolboxItemType); } }