db- off sql server

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Linq;
using System.Data.SqlClient;

namespace StopSQLServer
{
    public partial class Frm_Main : Form
    {
        public Frm_Main()
        {
            InitializeComponent();
        }

        void the button1_Click Private (SENDER Object, EventArgs E)
        {
            the using (the SqlConnection the SqlConnection new new = CON (// create a database connection object br /> @ "= LVSHUANG Server \ SHJ; pwd =; UID = SA; Master Database ="))
            {
                the try
                {
                    string strShutdown = "the WITH the NOWAIT the SHUTDOWN"; // Create the SQL string
                    SqlCommand cmd = new SqlCommand (); // Create command object
                    cmd.Connection = con; // set the connection properties
                    cmd.Connection.Open (); / / open database Connectivity
                    cmd.CommandText = strShutdown; SQL statements // set to be executed
                    cmd.ExecuteNonQuery (); // execute the SQL statement
                    MessageBox.Show ( "service has been successfully disconnected"); // message Boxes
                }
                The catch (Exception Euy)
                {
                    MessageBox.Show (euy.Message); // pop-up message box
                }
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();//关闭窗体
        }
    }
}