xamarinios 
namespace UIKit
{
    [Introduced(PlatformName.iOS, 8, 0, PlatformArchitecture.All, null)]
    [Register("UIAccessibilityCustomAction", true)]
    public class UIAccessibilityCustomAction : NSObject
    {
        [Obsolete("iOS9 does not allow creating an empty instance")]
        public UIAccessibilityCustomAction();
    }
}
Xamarin iOS 0.0
Information specific to xamarinios
Assembly

Xamarin.iOS , Version=0.0.0.0, PublicKeyToken=84e04ff9cfb79065

Referencing

The API is automatically referenced.

Obsolete iOS9 does not allow creating an empty instance
Platform Restrictions

This framework does not have platform annotations.

  • Built-in API
  • Package-provided API