Process.StartInfo.FileName 
Process.StartInfo.FileName = "cmd.exe"

Process.StartInfo.UseShellExecute 
Process.StartInfo.UseShellExecute = false

// Run "csc.exe /r:System.dll /out:sample.exe stdstr.cs". UseShellExecute is false because we're specifying
// an executable directly and in this case depending on it being in a PATH folder. By setting
// RedirectStandardOutput to true, the output of csc.exe is directed to the Process.StandardOutput stream
// which is then displayed in this console window directly.
using (Process compiler = new Process())
{
    compiler.StartInfo.FileName = "csc.exe";
    compiler.StartInfo.Arguments = "/r:System.dll /out:sample.exe stdstr.cs";
    compiler.StartInfo.UseShellExecute = false;
    compiler.StartInfo.RedirectStandardOutput = true;
    compiler.Start();

    Console.WriteLine(compiler.StandardOutput.ReadToEnd());

    compiler.WaitForExit();
}

public static extern bool SendMessage(IntPtr hwdn, int wMsg, int mParam, int lParam);
//從exe\dll\ico文件中獲取指定索引或ID號的圖標(biāo)句柄
[DllImport("shell32.dll", EntryPoint = "ExtractIcon")]

//獲取文件圖標(biāo)的API函數(shù)
[DllImport("shell32.dll", EntryPoint = "SHGetFileInfo")]
public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttribute, ref SHFILEINFO psfi, uint cbSizeFileInfo, uint Flags);

//從exe\dll\ico文件中生成圖標(biāo)句柄數(shù)組
[DllImport("shell32.dll")]
public static extern uint ExtractIconEx(string lpszFile, int nIconIndex, int[] phiconLarge, int[] phiconSmall, uint nIcons);

//清空指定驅(qū)動器的回收站
[DllImport("shell32.dll")]
public static extern int SHEmptyRecycleBin(IntPtr hwnd, int pszRootPath, int dwFlags);

//打開系統(tǒng)的命令窗口
[DllImport("shell32.dll", EntryPoint = "ShellExecute")]
public static extern int ShellExecute(int hwnd, String lpOperation, String lpFile, String lpParameters, String lpDirectory, int nShowCmd);

  //用來釋放被當(dāng)前線程中某個窗口捕獲的光標(biāo)
        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();
        //向指定的窗體發(fā)送Windows消息
        [DllImport("user32.dll")]
        public static extern bool SendMessage(IntPtr hwdn, int wMsg, int mParam, int lParam);
        //獲取文件夾圖標(biāo)的API函數(shù)
        [DllImport("User32.dll", EntryPoint = "DestroyIcon")]
        public static extern int DestroyIcon(IntPtr hIcon);
        //查詢或設(shè)置系統(tǒng)級參數(shù)
        [DllImport("user32.dll", EntryPoint = "SystemParametersInfoA")]
        public static extern Int32 SystemParametersInfo(Int32 uAction, Int32 uParam, string lpvparam, Int32 fuwinIni);
        //定義系統(tǒng)API入口點，用來關(guān)閉、注銷或者重啟計算機(jī)
        [DllImport("user32.dll", EntryPoint = "ExitWindowsEx", CharSet = CharSet.Ansi)]
        public static extern int ExitWindowsEx(int uFlags, int dwReserved);

//public為修飾符，People為結(jié)構(gòu)體名稱，name、age、sex為結(jié)構(gòu)體成員，每個成員包括修飾符、數(shù)據(jù)類型。
public struct People
{
   public string name;
   public int age;
   public char sex ;
};  

[StructLayout(LayoutKind.Sequential)]
struct num
{
    int a;
    int b;
}
//默認(rèn)情況下在內(nèi)存里是先排a,再排b
//也就是如果能取到a的地址,和b的地址,則相差一個int類型的長度,4字節(jié)

[StructLayout(LayoutKind.Explicit)]
struct S1
{
  [FieldOffset(0)]
  int a;
  [FieldOffset(0)]
  int b;
}
//需要用FieldOffset()設(shè)置每個成員的位置
//這樣就可以實現(xiàn)類似c的公用體的功能

[StructLayout(LayoutKind.Sequential)]
 public struct SHFILEINFO
 {
     public IntPtr hIcon;//圖標(biāo)句柄
     public IntPtr iIcon;//系統(tǒng)圖標(biāo)列表的索引
     public uint dwAttributes;//文件屬性
     [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
     public string szDisplayName;//文件的路徑
     [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
     public string szTypeName;//文件的類型名
 }

//定義系統(tǒng)API入口點，用來關(guān)閉、注銷或者重啟計算機(jī)
[DllImport("user32.dll", EntryPoint = "ExitWindowsEx", CharSet = CharSet.Ansi)]
public static extern int ExitWindowsEx(int uFlags, int dwReserved)

 public void CMDOperator(string cmd)
 {
     Process myProcess = new Process();//創(chuàng)建進(jìn)程對象
     myProcess.StartInfo.FileName = "cmd.exe";//設(shè)置打開cmd命令窗口
     myProcess.StartInfo.UseShellExecute = false;//不使用操作系統(tǒng)shell啟動進(jìn)程的值
     myProcess.StartInfo.RedirectStandardInput = true;//設(shè)置可以從標(biāo)準(zhǔn)輸入流讀取值
     myProcess.StartInfo.RedirectStandardOutput = true;//設(shè)置可以向標(biāo)準(zhǔn)輸出流寫入值
     myProcess.StartInfo.RedirectStandardError = true;//設(shè)置可以顯示輸入輸出流中出現(xiàn)的錯誤
     myProcess.StartInfo.CreateNoWindow = true;//設(shè)置在新窗口中啟動進(jìn)程
     myProcess.Start();//啟動進(jìn)程
     myProcess.StandardInput.WriteLine(cmd);//傳入要執(zhí)行的命令
}

//注銷按鈕事件程序
//調(diào)用win32類中的ExitWindowsEx方法。
 private void button1_Click(object sender, EventArgs e)
{
    Win32.ExitWindowsEx(0, 0);//注銷計算機(jī)
}
//關(guān)機(jī)按鈕事件程序
//調(diào)用Opera類中的CMDOperator方法。使用shell腳本觸發(fā)
 private void button2_Click(object sender, EventArgs e)
 {
     oper.CMDOperator("shutdown -s -t 0");//關(guān)閉計算機(jī)
 }
//重啟按鈕事件程序
//調(diào)用Opera類中的CMDOperator方法。使用shell腳本觸發(fā)
private void button3_Click(object sender, EventArgs e)
{
    oper.CMDOperator("shutdown -r -t 0");//重啟計算機(jī)
}