Lấy liên kết từ PDF trong .NET SDK

using Aspose.Pdf.Cloud.Sdk.Model;

namespace Links
{
    public class LinksExtract
    {
        public static async Task ShowInfo(string documentName, int pageNumber, string remoteFolder)
        {
		// Get your AppSid and AppSecret from https://dashboard.aspose.cloud (free registration required). 
		pdfApi = new PdfApi(AppSecret, AppSid);

                using (var file = File.OpenRead(Path.Combine(localFolder, documentName)))
		{ // Upload the local PDF to cloud storage folder name.
                    FilesUploadResult uploadResponse = await pdfApi.UploadFileAsync(Path.Combine(remoteFolder, documentName), documentName);
                    Console.WriteLine(uploadResponse.Uploaded[0]);
                }

                // Get link annotations from the PDF in cloud storage.
                LinkAnnotationsResponse response = await pdfApi.GetPageLinkAnnotationsAsync(documentName, pageNumber, folder: remoteFolder);

                // Checks the response and logs the result.
                if (response == null)
                    Console.WriteLine("LinksExtract(): Unexpected error!");
                else if (response.Code < 200 || response.Code > 299)
                    Console.WriteLine("LinksExtract(): Failed to receive links from the document.");
                else if (response.Links == null || response.Links.List == null || response.Links.List.Count == 0)
                    Console.WriteLine("LinksExtract(): links not found in the document.");
                else
                { // Show links.
                    Console.WriteLine("LinksExtract(): all links successfully received from the document '{0}.", documentName);
                    foreach (LinkAnnotation link in response.Links.List)
                        Console.WriteLine(link.ToString());
                }
            }
        }
    }