Implementing Repository Pattern With Entity Framework

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using RepositoryProjectSample.Implementations;

namespace RepositoryProjectSample
{
    class Program
    {
        static void Main(string[] args)
        {
            var unitOfWork = new UnitOfWork<ProjectCodeEntities>();
            var blogRepository = unitOfWork.GetRepository<BlogPost>();
            var catRepository = unitOfWork.GetRepository<Category>();
            using (unitOfWork)
            {
                Guid postId = Guid.NewGuid();
                Guid catId = Guid.NewGuid();
                System.Console.WriteLine("Enter Category of your blog post:");
                var cat = new Category { Id = catId, Name = System.Console.ReadLine() };
                System.Console.WriteLine("Enter Title of your blog post:");
                var post = new BlogPost { Id = postId, Title = System.Console.ReadLine(), Content = "Hello Universe!", PublishDate = new DateTime(2011, 1, 1), Category = cat };

                blogRepository.Add(post);

                int i = unitOfWork.Save();
                if (i > 0)
                    System.Console.WriteLine("Successfully Saved!!");
                else
                    System.Console.WriteLine("Failed to save!");

                System.Console.WriteLine("List of all post:");
                var resultPost = blogRepository.SelectAll();

                foreach (var item in resultPost)
                {
                    System.Console.WriteLine(item.Title);
                }

                System.Console.WriteLine("List of all category:");
                var resultCat = catRepository.SelectAll();

                foreach (var item in resultCat)
                {
                    System.Console.WriteLine(item.Name);
                }

                System.Console.WriteLine("Press any key to quit!");
                System.Console.Read();
            }
        }
    }
}