namespace System.Runtime.Versioning { [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Module | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum | AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Event | AttributeTargets.Interface, AllowMultiple = true, Inherited = false)] internal sealed class ObsoletedOSPlatformAttribute : System.Runtime.Versioning.OSPlatformAttribute { public string Message { get; } public string Url { get; set; } public ObsoletedOSPlatformAttribute(string platformName) : base(platformName) { } public ObsoletedOSPlatformAttribute(string platformName, string message) : base(platformName) { Message = message; } } }