public IQueryable<Item> FindItemsByDescription(string description)
{
   return from item in _dc.Items
          where item.Description.Contains(description);
}

public IQueryable<Item> FindItemsByDescription(string description, int pageIndex, int pageSize)
{
   return from item in _dc.Items
          where item.Description.
          Contains(description).
          Skip((pageIndex - 1) * pageSize).
          Take(pageSize);
}

int totalCount = from item in _dc.Items
                 where item.Description.
                 Contains(description).Count();

int numberOfPages = (int)(totalCount/pageSize);

public IQueryable<Item> FindItemsByDescription(string description, int resultAmount)
{
   return from item in _dc.Items
          where item.Description.Contains(description).Take(resultAmount);
}

public IQueryable<Item> FindItemsByDescription(string description, int resultAmount, int page)
{
   return from item in _dc.Items
          where item.Description.Contains(description).Skip(resultAmount * page).Take(resultAmount);
}