Xamarin表单上传到google drive

using Google.Apis.Auth.OAuth2;
using Google.Apis.Drive.v3;
using Google.Apis.Drive.v3.Data;
using Google.Apis.Services;
using Google.Apis.Util.Store;
using System;
using System.IO;
using System.Threading;

namespace XamarinGoogleDriveUpload
{
    class Program
    {
        static string[] Scopes = { DriveService.Scope.Drive };
        static string ApplicationName = "Xamarin Google Drive Upload";

        static void Main(string[] args)
        {
            UserCredential credential;

            using (var stream = new FileStream("credentials.json", FileMode.Open, FileAccess.Read))
            {
                string credPath = "token.json";
                credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                    GoogleClientSecrets.Load(stream).Secrets,
                    Scopes,
                    "user",
                    CancellationToken.None,
                    new FileDataStore(credPath, true)).Result;
                Console.WriteLine("Credential file saved to: " + credPath);
            }

            // 创建Drive API服务
            var service = new DriveService(new BaseClientService.Initializer()
            {
                HttpClientInitializer = credential,
                ApplicationName = ApplicationName,
            });

            // 上传表单数据到Google Drive
            var fileMetadata = new File()
            {
                Name = "FormSubmission.pdf",
                MimeType = "application/pdf"
            };
            var filePath = "path/to/form.pdf"; // 表单文件路径
            using (var stream = new FileStream(filePath, FileMode.Open))
            {
                var request = service.Files.Create(fileMetadata, stream, "application/pdf");
                request.Upload();
            }

            Console.WriteLine("File uploaded successfully.");
        }
    }
}