private void addButton_Click(object sender, System.EventArgs e)
 {
     using(PostForm form = new PostForm(parentBlog))
     {
         if (form.ShowDialog(this) == DialogResult.OK)
         {
             PopulatePostList();
         }
     }
 }
        private void postsList_SelectedIndexChanged(object sender, System.EventArgs e)
        {
            if (postsList.SelectedItems.Count == 1)
            {
                Post post = (Post) postsList.SelectedItems[0].Tag;

                using(PostForm form = new PostForm(parentBlog, post))
                {
                    if (form.ShowDialog(this) == DialogResult.OK)
                    {
                        PopulatePostList();
                    }
                }
            }
        }