如何在Access表里增加修改删除字段

在网上找了一文章：
using System;
using System.Collections.Generic;
using System.Text;
using ADOX;
namespace ADOXCreateTable
...{
    class Program
    ...{
        static void Main(string[] args)
        ...{
         
    string dbName = "D:\DataBase\FirstCatalog.mdb";
    ADOX.CatalogClass catlog = new ADOX.CatalogClass();
    catlog.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + dbName + ";"+"Jet OLEDB:Engine Type=5");

    ADOX.TableClass table = new ADOX.TableClass();
    table.ParentCatalog = catlog;
    table.Name = "FirstTable";

    //StuId Column(AutoIncrement )
    ADOX.ColumnClass col1 = new ADOX.ColumnClass();
    col1.ParentCatalog = catlog;
    col1.Type = ADOX.DataTypeEnum.adInteger;
    col1.Name = "StuId";
    col1.Properties["Jet OLEDB:Allow Zero Length"].Value = false;
    col1.Properties["AutoIncrement"].Value = true;
 
 
    //Name Column
    ADOX.ColumnClass col2 = new ADOX.ColumnClass();
    col