DataTable 只保留想要的几列

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Collections.Generic;

public partial class Default3 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        List<Person> list = new List<Person> {
                    new Person(){Id=1,Name="小明'\"}[]{><,\\/~、\r\n"},
                    new Person(){Id=2,Name="小华"}
            };

        DataTable dt = new DataTable("MatrixInfo");
        DataColumn dc1 = new DataColumn("ID");
        DataColumn dc2 = new DataColumn("Name");
        dt.Columns.Add(dc1);
        dt.Columns.Add(dc2);
        foreach (Person p in list)
        {
            DataRow dr = dt.NewRow();
            dr["ID"] = p.Id;
            dr["Name"] = p.Name;
            dt.Rows.Add(dr);
        }

        DataTable dv = dt.DefaultView.ToTable(false, new string[] { "Name" });
    }

    public class Person
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }
}