请高人解答，用OleDbCommand怎么像SqlCommand一样把SQl语句和连接字符串一起带下去啊？

Question

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Data.OleDb;namespace Csharp第五章
{
    public partial class 新增学生信息 : Form
    {
        public 新增学生信息()
        {
            InitializeComponent();
        }     
        private void button2_Click(object sender, EventArgs e)
        {
            DialogResult result;
            result = MessageBox.Show("确定退出？", "退出提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);
            if (result == DialogResult.OK)
            {
                this.Close();
            } 
           
        }
        private static string connString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\projects\School\MySchool.accdb;Persist Security Info=False";
        public static OleDbConnection connection = new OleDbConnection(connString);        private void button1_Click(object sender, EventArgs e)
        {
            string userName = textBox1.Text;
            string password = textBox2.Text;
            string name = textBox4.Text;
            int age = Convert.ToInt32(textBox5.Text);
            string adress = textBox6.Text;
            int tel = Convert.ToInt32(textBox7.Text);
            string email = textBox8.Text;
            string specialty = comboBox1.Text;
            string Cclass = comboBox2.Text;
            string sql = "insert into 新增学生信息(userName,passWord,state,name,age,adress,tel,email,sex,specialty,cclass) values('" + userName + "','" + password+ "',1,'" + name + "','" + age+ "','" + adress + "','" +  tel + "','" + email + "','" + '男' + "','" + specialty+ "','" +Cclass+ "')";
            using (OleDbCommand command = new OleDbCommand(sql))
            {
                connection.Open();
                MessageBox.Show("打开数据库成功");
                int reselt = command.ExecuteNonQuery();  //这里会有"ExecuteNonQuery: Connection 属性尚未初始化。"报错！
                if (reselt !=1)
                {
                    MessageBox.Show("添加失败！", "操作提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                } 
                else
                {
                    MessageBox.Show("添加成功！", "操作提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                connection.Close();
            }    
            
            }    }
}

Answer 1

OleDbCommand command = new OleDbCommand(sql,connection)
和sql的一样。