How to update a single column in LINQ without loading the entire row?

using (MyDataContext wdc = new MyDataContext())
{
  Article article = wdc.Article.First(p => p.ID == id);
  article.ItemsInStock = itemsinstock;
  wdc.SubmitChanges();
}

wdc.ExecuteCommand("UPDATE Article SET ItemsInStock = @1 WHERE ID = @2", itemsinstock,id);

UPDATE ... SET ... WHERE ID = @2

UPDATE ... SET ... WHERE ID = @2 AND ItemsInStock = @1 AND SomeOtherColumn = @3 AND...

context.Articles.Attach(article /* article with updated values */, new Article { ID = articleID, ItemsInStock = -1 } /* pretend that this is the original article */);
context.SubmitChanges();