Retrieves a random photo byte[]

PhotoService.cs

// =============================================
// AUTHOR : jzeferino
// PURPOSE : A simple Xamarin introduction demo
// =============================================

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

namespace SharedCode.Service
{
    public class PhotoService
    {
        private HttpClient _client;
        private const string RandomImageUrl = "https://unsplash.it/540/960/?random";
        
        public PhotoService()
        {
            _client = new HttpClient();
        }

        private async Task<byte[]> LoadImageAsync(string imageUrl)
        {
            try
            {
                var bytes = await _client.GetByteArrayAsync(imageUrl);
                if (bytes == null || bytes.Length == 0)
                {
                    throw new Exception("No content.");
                }
                return bytes;
            }
            catch (Exception)
            {
                // TODO:
                // Deal with the error.
            }

            return null;
        }

        public Task<byte[]> LoadImageAsync() => LoadImageAsync(RandomImageUrl);
    }
}