xamarinmac 
namespace Foundation
{
    [Introduced(PlatformName.iOS, 8, 0, PlatformArchitecture.All, null)]
    [Introduced(PlatformName.MacOSX, 10, 10, PlatformArchitecture.All, null)]
    [Introduced(PlatformName.WatchOS, 2, 0, PlatformArchitecture.All, null)]
    [Introduced(PlatformName.TvOS, 9, 0, PlatformArchitecture.All, null)]
    [Register("NSUserActivity", true)]
    public class NSUserActivity : NSObject
    {
        [Obsolete("Use the constructor that allows you to set an activity type.")]
        public NSUserActivity();
    }
}
Xamarin iOS 0.0
Xamarin macOS 0.0
Xamarin tvOS 0.0
Information specific to xamarinmac
Assembly

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

Referencing

The API is automatically referenced.

Obsolete Use the constructor that allows you to set an activity type.
Platform Restrictions

This framework does not have platform annotations.

  • Built-in API
  • Package-provided API