asp.net – 如何忽略Model属性的验证？

using System.ComponentModel.DataAnnotations;
namespace abc.Model
{
using System;
using System.Collections.Generic;

public partial class check_master
{
    public int MCheck_id { get; set; }
    [Required]
    public string check_name { get; set; }
    public string field { get; set; }
    public Nullable<byte> max_length { get; set; }
    public int check_id { get; set; }
}
}

视图

@using (Html.BeginForm("addCheck",""))
  {
  <input type="hidden" id="from" name="from" value="@ViewBag.from" readonly="readonly"  />
   <fieldset>


        <tr>
            <td>
                @Html.DropDownList("check_master","--select checks--")
            </td>
            <td>
                @Html.TextBox("checkName","")
                @Html.ValidationMessage("check_name")
            </td>
        </tr>
    </table>
</fieldset>
<p>
    <input type="submit" value="Add" />
</p>

}