PM> Install-Package Hasseware.SlideShare

static async Task FeaturedSample(CancellationToken cancellationToken)
{
	using (var client = new ServiceClient("<ApiKey>", "<SharedSecret>", null))
	{
		foreach (var feeditem in await ServiceClient.Feeds.GetAsync(SlideShareFeed.Featured, cancellationToken).ConfigureAwait(false))
		{
			var ss = await client.Slideshow.GetAsync(feeditem.SlideshowUrl.AbsoluteUri, cancellationToken: cancellationToken).ConfigureAwait(false);
			var md = await ServiceClient.Metadata.GetAsync(ss.SlideshowUrl.AbsoluteUri, cancellationToken).ConfigureAwait(false);

			foreach (var uri in md)
			{
				Trace.TraceInformation(uri.AbsoluteUri);
			}
		}
	}
}

static async Task UploadSample(CancellationToken cancellationToken)
{
	var credentials = new System.Net.NetworkCredential("<Username>", "<Password>");
    using (var client = new ServiceClient("<ApiKey>", "<SharedSecret>", credentials, () => new FileSystemStorage()))
	{
		int id = await client.Slideshow.UploadAsync("slideshare_presentation.pptx",
    		new SlideshowDetailOptions { Title = "Sample Presentation" }, cancellationToken);
	}
}

public sealed class FileSystemStorage : IStorageProvider
{
	public Task<System.IO.Stream> OpenAsync(string filepath, CancellationToken cancellationToken)
	{
		return Task.Factory.StartNew(() => (System.IO.Stream)new System.IO.FileStream(filepath,
			System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.None, 4096, true));
	}
}