Sample of UIPickerController and ALAssetsLibrary

gistfile1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using MonoTouch.Foundation;
using MonoTouch.UIKit;
using MonoTouch.AssetsLibrary;

namespace ImagePickerSample
{
    [Register("AppDelegate")]
    public partial class AppDelegate : UIApplicationDelegate
    {
        UIWindow window;
        UIImagePickerController imagePickerController;
        
        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            window = new UIWindow(UIScreen.MainScreen.Bounds);
			
			      // Create image picker.
            imagePickerController = new UIImagePickerController();
            // Set the source.
            imagePickerController.SourceType = UIImagePickerControllerSourceType.SavedPhotosAlbum;
            // Handle what happens when we click the image.
            imagePickerController.FinishedPickingMedia += delegate(object sender, UIImagePickerMediaPickedEventArgs e)
            {
              // Normally we would dismiss this viewcontroller, but not in this sample.
              
              // Get the reference URL.
                NSString key = new NSString("UIImagePickerControllerReferenceURL");
                if (e.Info.ContainsKey(key))
                {
                    // Display it.
                    Console.WriteLine(e.Info[key].ToString());
                    UIAlertView alert = new UIAlertView("", e.Info[key].ToString(), null, "Ok", null);
                    alert.Show();
                }
                else
                {
                    // In theory this will never ever happen.
                    UIAlertView alert = new UIAlertView("Error", "No refernece found.", null, "Ok", null);
                    alert.Show();
                }
            };

            window.RootViewController = imagePickerController;
            window.MakeKeyAndVisible();


            /*
            // Put your asset string here, will output in the console output when you click an image, copy/paste it here.
            string assetString = "assets-library://asset/asset.JPG?id=477B5C5D-8A30-49E1-9F4A-CA89F5751CB4&ext=JPG";
            ALAssetsLibrary asetLibrary = new ALAssetsLibrary();
            asetLibrary.AssetForUrl(new NSUrl(assetString), delegate(ALAsset asset)
            {
                Console.WriteLine("AssetType: " + asset.AssetType);
                // Loads a UIImage from the refernece URL we got originally.
                UIImage image = UIImage.FromImage(asset.DefaultRepresentation.GetImage());
                Console.WriteLine("ImageSize: " + image.Size);

            }, delegate(NSError error)
            {
                Console.WriteLine("Load Asset Error: " + error.LocalizedDescription);
            });
            */
           
			
            return true;
        }
    }
}