how export xml file from Blogger using with google api

i want to export my blogger using with google api v2. (**xml format**)   

here is some of my codes :   

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    using Google.GData.Blogger;
    using Google.GData.Client;
    using Google.GData.Photos;
    using Google.GData.Extensions;
    using System.IO;
    
            private void button1_Click(object sender, EventArgs e)
            {
                CheckForIllegalCrossThreadCalls = false;
                Service service = new Service("blogger", "MyGoogleApi");
                service.Credentials = new GDataCredentials("blobloblo", 
"blablabla");
                GDataGAuthRequestFactory factory = 
(GDataGAuthRequestFactory)service.RequestFactory;
                factory.AccountType = "GOOGLE";
    
                
/////////////////////////////////////////////////////////////

                //here is the url to retrieve export file :   

                //https://www.blogger.com/feeds/blog-id/archive  

                //how can i use this url for my purpose?
            }

*Tags : C# - Google API Blogger v2.0 - Export - XML*

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