public static NSUserActivity CreateNSUserActivity(Restaurant userInfo)
        {
            var activityType = ActivityTypes.View;
            var activity     = new NSUserActivity(activityType);

            activity.EligibleForSearch         = true;     // HACK: can result in duplicates with CoreSpotlight
            activity.EligibleForPublicIndexing = false;
            activity.EligibleForHandoff        = false;

            activity.Title = "Restaurant " + userInfo.Name;

            //			var keywords = new NSString[] {new NSString("Add"), new NSString("Todo"), new NSString("Empty"), new NSString("Task") };
            //			activity.Keywords = new NSSet<NSString>(keywords);

            var attributeSet = new CoreSpotlight.CSSearchableItemAttributeSet();

            attributeSet.DisplayName        = userInfo.Name;
            attributeSet.ContentDescription = userInfo.Cuisine + " " + userInfo.Chef;

            // Handoff https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/Handoff/AdoptingHandoff/AdoptingHandoff.html
//			attributeSet.RelatedUniqueIdentifier = userInfo.Number.ToString(); // CoreSpotlight "id"


            activity.AddUserInfoEntries(NSDictionary.FromObjectAndKey(new NSString(userInfo.Number.ToString()), ActivityKeys.Id));

            activity.ContentAttributeSet = attributeSet;

            activity.BecomeCurrent();              // don't forget to ResignCurrent()

            return(activity);
        }
		public static NSUserActivity CreateNSUserActivity(Restaurant userInfo)
		{
			var activityType = ActivityTypes.View;
			var activity = new NSUserActivity(activityType);
			activity.EligibleForSearch = true; // HACK: can result in duplicates with CoreSpotlight
			activity.EligibleForPublicIndexing = false;
			activity.EligibleForHandoff = false;

			activity.Title = "Restaurant " + userInfo.Name;

			//			var keywords = new NSString[] {new NSString("Add"), new NSString("Todo"), new NSString("Empty"), new NSString("Task") };
			//			activity.Keywords = new NSSet<NSString>(keywords);

			var attributeSet = new CoreSpotlight.CSSearchableItemAttributeSet ();

			attributeSet.DisplayName = userInfo.Name;
			attributeSet.ContentDescription = userInfo.Cuisine + " " + userInfo.Chef;

			// Handoff https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/Handoff/AdoptingHandoff/AdoptingHandoff.html
//			attributeSet.RelatedUniqueIdentifier = userInfo.Number.ToString(); // CoreSpotlight "id"


			activity.AddUserInfoEntries(NSDictionary.FromObjectAndKey(new NSString(userInfo.Number.ToString()), ActivityKeys.Id));

			activity.ContentAttributeSet = attributeSet;

			activity.BecomeCurrent (); // don't forget to ResignCurrent()

			return activity;
		}