Acceder a blogger mediante Google API

Descargar Google Data API Setup(1.4.0.2).msi 

Código de ejemplo, agrega un post asignándole dos etiquetas:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Google.GData.Client;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] labels = {"label1", "label2"};        //labels que le quiero poner al post

            AddPost("titulo1", "body html", labels);     //titulo, cuerpo html y array de labels
        }

        public static bool AddPost(string title, string bodyHTML, string[] labels)
        {
            Service service = new Service("blogger", "");
            service.Credentials = new GDataCredentials("", "");
            AtomEntry newPost = new AtomEntry();
            newPost.Title.Text = title;
            newPost.Content = new AtomContent();
            newPost.Content.Content = bodyHTML;
            newPost.Content.Type = "html";
            foreach (string label in labels)
            {
                AtomCategory cat = new AtomCategory();
                cat.Scheme = new Uri("http://www.blogger.com/atom/ns#");
                cat.Term = label;
                newPost.Categories.Add(cat);
            }
            AtomEntry response = null;
            try
            {
                response = service.Insert(new Uri("http://expressraider.blogspot.com/feeds/posts/default"), newPost);
            }
            catch (GDataRequestException exception)
            {
                if (exception.ResponseString == "Blog has exceeded rate limit or otherwise requires word verification for new posts")
                {
                    return false;
                }
                else
                {
                    throw exception;
                }
            }
            if (response == null)
            {
                throw new Exception("Error inesperado");
            }
            return true;
        }

    }
}