void AddNewItem()
        {
            var value = "foo";

            var jsonDate = DateTime.UtcNow.ToString("O");
            var vals     = NSDictionary.FromObjectsAndKeys(
                new NSObject[] { new NSString(value), NSNumber.FromBoolean(false), new NSString(jsonDate) },
                new NSObject[] { new NSString("text"), new NSString("check"), new NSString("created_at") }
                );

            var     doc = database.CreateUntitledDocument();
            NSError error;
            var     result = doc.PutProperties(vals);

            if (result == null)
            {
                throw new ApplicationException("failed to put props");
            }
        }