namespace System.ComponentModel { public sealed class DesignerAttribute : Attribute { public string DesignerBaseTypeName { get; } public string DesignerTypeName { get; } public DesignerAttribute(string designerTypeName); public DesignerAttribute(string designerTypeName, string designerBaseTypeName); public DesignerAttribute(string designerTypeName, Type designerBaseType); public DesignerAttribute(Type designerType); public DesignerAttribute(Type designerType, Type designerBaseType); } }