namespace System.ComponentModel.DataAnnotations { public class UIHintAttribute : Attribute { public string UIHint { get; } public string PresentationLayer { get; } public IDictionary<string, object> ControlParameters { get; } public UIHintAttribute(string uiHint); public UIHintAttribute(string uiHint, string presentationLayer); public UIHintAttribute(string uiHint, string presentationLayer, params object[] controlParameters); } }