ObsoletedInOSPlatformAttribute sealed class ObsoletedInOSPlatformAttribute : OSPlatformAttribute Marks APIs that were obsoleted in a given operating system version. Documentation Code public string Message { get; } public string Url { get; set; } public ObsoletedInOSPlatformAttribute(string platformName) public ObsoletedInOSPlatformAttribute(string platformName, string message)