Launch a process by setting the curr dir

class Program
{
    static void Main()
    {
        const uint NORMAL_PRIORITY_CLASS = 0x0020;

        bool retValue;
        string Application = Environment.GetEnvironmentVariable("windir") + @"\Notepad.exe";
        string CommandLine = "";
        PROCESS_INFORMATION pInfo = new PROCESS_INFORMATION();
        STARTUPINFO sInfo = new STARTUPINFO();
        SECURITY_ATTRIBUTES pSec = new SECURITY_ATTRIBUTES();
        SECURITY_ATTRIBUTES tSec = new SECURITY_ATTRIBUTES();
        pSec.nLength = Marshal.SizeOf(pSec);
        tSec.nLength = Marshal.SizeOf(tSec);

        //Open Notepad with C:\ as current directory

        string currentDirectory = @"C:\";

        retValue = CreateProcess(Application, CommandLine,
        ref pSec, ref tSec, false, NORMAL_PRIORITY_CLASS,
        IntPtr.Zero, currentDirectory, ref sInfo, out pInfo);

        Console.WriteLine("Process ID (PID): " + pInfo.dwProcessId);
        Console.WriteLine("Process Handle : " + pInfo.hProcess);

        Process p = new Process();
        p.StartInfo = new ProcessStartInfo();

    }


    [DllImport("kernel32.dll")]
    public static extern bool CreateProcess(string lpApplicationName,
        string lpCommandLine,
        ref SECURITY_ATTRIBUTES lpProcessAttributes,
        ref SECURITY_ATTRIBUTES lpThreadAttributes,
        bool bInheritHandles,
        uint dwCreationFlags,
        IntPtr lpEnvironment,
        string lpCurrentDirectory,
        [In] ref STARTUPINFO
        lpStartupInfo,
        out PROCESS_INFORMATION lpProcessInformation);


    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct STARTUPINFO
    {
        public Int32 cb;
        public string lpReserved;
        public string lpDesktop;
        public string lpTitle;
        public Int32 dwX;
        public Int32 dwY;
        public Int32 dwXSize;
        public Int32 dwYSize;
        public Int32 dwXCountChars;
        public Int32 dwYCountChars;
        public Int32 dwFillAttribute;
        public Int32 dwFlags;
        public Int16 wShowWindow;
        public Int16 cbReserved2;
        public IntPtr lpReserved2;
        public IntPtr hStdInput;
        public IntPtr hStdOutput;
        public IntPtr hStdError;
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct PROCESS_INFORMATION
    {
        public IntPtr hProcess;
        public IntPtr hThread;
        public int dwProcessId;
        public int dwThreadId;
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct SECURITY_ATTRIBUTES
    {
        public int nLength;
        public unsafe byte* lpSecurityDescriptor;
        public int bInheritHandle;
    }

}