<form action="/DeleteItem/@item.Id" method="post">
        <td><input type="submit" name="submit" value="Delete"/></td>
</form>

[HttpPost]
    [Route("deleteItem/{id}")]
    public IActionResult DeleteItem(int id)
    {
        var temp = _context.Auction.Where(x => x.Id == id).SingleOrDefault();
        _context.Auction.Remove(temp);
        _context.SaveChanges();
        return RedirectToAction("Current", "Home");
    }

var productToRemove = _context.Auction.SingleOrDefault(x => x.Id == id);