droping a column table in simples codes

Hi,

 

I need to do two things with my table:

1. create (or add) a column in my table

2. delete (or drope) a column from my table

 

All this using c# code.

I do write theses codes to create a ID primary key for example and its works perfetly:

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.OleDb;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{

public Form1()
{
InitializeComponent();
}

OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\FlexitFAA\Datas\faa.mdb;Persist Security Info=False");
OleDbCommand comm;

private void button1_Click(object sender, EventArgs e)
{
conn.Open();
OleDbCommand cmd2 = new OleDbCommand();

cmd2 = new OleDbCommand("ALTER TABLE Test ADD " + textBox1.Text + " int IDENTITY(1,1) PRIMARY KEY)", conn);
cmd2.ExecuteNonQuery();
conn.Close();
} 

 

Now I need to do the second thing. I want to delete (or drop) the name of column that I will insert in my table.

 

Please could you help writing clearly the codes

 

Thank you.