错误 3 当前上下文中不存在名称“conn”

[qq_26336939]

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;

namespace ConsoleApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
using (SqlConnection conn = new SqlConnection (
"Data Source=.;Initial Catalog=hospitalms;User ID Security==sa;Password=123456"));
{
conn.Open();
}
}

private void Form1_Load(object sender, EventArgs e)
{

}
}
}

[csdnFUCKINGSUCKS]

using的最后多了个分号，结束了using的代码块，再在下面的代码里访问conn当然是访问不到的。 话说你的IDE连这么基本的语法错误都不能即时显示吗？