Wino-Mail/Wino.Core.UWP/Extensions/StorageFileExtensions.cs

using System;
using System.IO;
using System.Threading.Tasks;
using Windows.Storage;
using Wino.Core.Domain.Models.Common;

namespace Wino.Core.UWP.Extensions
{
    public static class StorageFileExtensions
    {
        public static async Task<SharedFile> ToSharedFileAsync(this Windows.Storage.StorageFile storageFile)
        {
            var content = await storageFile.ToByteArrayAsync();

            return new SharedFile(storageFile.Path, content);
        }

        public static async Task<byte[]> ToByteArrayAsync(this StorageFile file)
        {
            if (file == null)
                throw new ArgumentNullException(nameof(file));

            using (var stream = await file.OpenReadAsync())
            using (var memoryStream = new MemoryStream())
            {
                await stream.AsStreamForRead().CopyToAsync(memoryStream);
                return memoryStream.ToArray();
            }
        }
    }
}