using (SqlConnevtion conn = new SqlConnevtion(connectionString))出错，怎么处理

Question

这个全部代码的
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

    public static string connectionString = @"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=F:\C#\WindowsFormsApplication2\WindowsFormsApplication2\myDB.mdf;Integrated Security=True";;

    private void button1_Click(object sender, EventArgs e)
    {
        using (SqlConnevtion conn = new SqlConnevtion(connectionString))
        {
            try
            { 
            conn.Open();
            string sql = "insert into sysUserTable(username,pwd) values('aa'.'123')";
            SqlCommand cmd = new SqlCommand(sql, conn);
            cmd.ExecuteNonQuery();//用于insert update和delet
            conn.Close();

        }
        catch
        {
            MessageBox.Show("用户名已存在");
        }
    }
}

}
这个 是问题的图(https://img-ask.csdn.net/upload/202005/23/1590165485_977330.png)

请问一下，我该怎么样去处理这个问题呢

Answer 1

Sqlconnection 不是 Sqlconnevtion