求助，提示当前上下文不存在名称 conn，只是简单连接数据库
using System;using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data.SqlClient;
namespace
{
/// <summary>
/// MainWindow.xaml 的交互逻辑
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void button1_Click(object sender, RoutedEventArgs e)
{
using (SqlConnection conn = new SqlConnection("Data Source=.; Initial Catalog=Student;User ID=sa;Password=sa"));
{
conn.Open();
}
}
}
}
conn一直提示不存在名称 改为别的也不行
