Asynchronously download an image in just a few lines of code

ImageDownloader

using System;
using System.Threading.Tasks;
using System.Net.Http;

using UIKit;
using Foundation;

namespace AsyncImageDownload
{
	public class ImageDownloader
	{
		public async Task<UIImage> GetAsync (Uri uri)
		{
			var bytes = await new HttpClient ().GetByteArrayAsync (uri); 
			var data = NSData.FromArray (bytes);

			return UIImage.LoadFromData (data);
		}
	}
}