c# 存储 过程操作数据库 附加、分离数据库

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Diagnostics;

namespace OperateDB
{
    public partial class MaiForm : Form
    {
        private static MaiForm instance;
        private static readonly object padlock = new object（）;
        private MaiForm（）
        {
            InitializeComponent（）;
        }

        public static MaiForm GetInstance（）
        {
            lock （padlock）
            {
                if （instance == null || instance.IsDisposed）
                {
                    instance = new MaiForm（）; 
                }
                return instance;
            }
        }

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件        918  2009-01-07 20:26  OperateDB\OperateDB.sln

    ..A..H.     26112  2009-03-27 19:47  OperateDB\OperateDB.suo

     文件      32768  2009-03-27 19:47  OperateDB\OperationDB\bin\Debug\OperateDB.exe

     文件      34304  2009-03-27 19:47  OperateDB\OperationDB\bin\Debug\OperateDB.pdb

     文件       5632  2005-11-11 22:25  OperateDB\OperationDB\bin\Debug\OperateDB.vshost.exe

     文件     316456  2009-01-20 11:08  OperateDB\OperationDB\bin\Debug\OperateDB_Secure\OperateDB.exe

     文件       1078  2009-01-07 20:50  OperateDB\OperationDB\hotel.ico

     文件       5484  2009-03-27 19:47  OperateDB\OperationDB\MaiForm.cs

     文件      17065  2009-03-27 19:47  OperateDB\OperationDB\MaiForm.Designer.cs

     文件      10133  2009-03-27 19:46  OperateDB\OperationDB\MaiForm.resx

     文件        844  2009-03-27 19:46  OperateDB\OperationDB\obj\Debug\OperateDB.csproj.GenerateResource.Cache

     文件      32768  2009-03-27 19:47  OperateDB\OperationDB\obj\Debug\OperateDB.exe

     文件       3024  2009-03-27 19:46  OperateDB\OperationDB\obj\Debug\OperateDB.MaiForm.resources

     文件      34304  2009-03-27 19:47  OperateDB\OperationDB\obj\Debug\OperateDB.pdb

     文件        180  2009-02-11 19:25  OperateDB\OperationDB\obj\Debug\OperateDB.Properties.Resources.resources

     文件       6001  2009-03-27 19:36  OperateDB\OperationDB\obj\Debug\ResolveAssemblyReference.cache

     文件       4608  2009-01-07 20:24  OperateDB\OperationDB\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll

     文件        284  2009-03-27 19:47  OperateDB\OperationDB\obj\OperateDB.csproj.FileList.txt

     文件       3533  2009-02-11 19:21  OperateDB\OperationDB\OperateDB.csproj

     文件       2139  2009-02-11 19:22  OperateDB\OperationDB\Program.cs

     文件       1198  2009-01-07 20:44  OperateDB\OperationDB\Properties\AssemblyInfo.cs

     文件       2840  2009-01-07 20:24  OperateDB\OperationDB\Properties\Resources.Designer.cs

     文件       5612  2007-01-22 14:54  OperateDB\OperationDB\Properties\Resources.resx

     文件       1105  2009-01-07 20:24  OperateDB\OperationDB\Properties\Settings.Designer.cs

     文件        249  2007-01-22 14:54  OperateDB\OperationDB\Properties\Settings.settings

     文件       4147  2009-02-21 09:47  OperateDB\OperationDB\SQLHelper.cs

     目录          0  2009-02-13 08:42  OperateDB\OperationDB\bin\Debug\OperateDB_Secure

     目录          0  2009-02-13 08:42  OperateDB\OperationDB\obj\Debug\Refactor

     目录          0  2009-02-13 08:42  OperateDB\OperationDB\obj\Debug\TempPE

     目录          0  2009-02-13 08:42  OperateDB\OperationDB\bin\Debug

............此处省略9个文件信息