在c#中基于鼠标点击获取活动窗口名称

我正试图让一个应用程序获取用户点击的窗口的鼠标点击位置和标题（名称）。我目前使用的是LowLevelMouseProc，它的效果很好，但每当我点击谷歌chrome时，它就会导致应用程序崩溃。这是代码：

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Runtime.InteropServices;
  using System.Windows.Forms;
 using System.Diagnostics;
        //An attempt to print the screen name of the active window and mouse coordinates at every mouse click
namespace Project1
 {
class InterceptMouse
{
    private static LowLevelMouseProc _proc = HookCallback;
    private static IntPtr _hookID = IntPtr.Zero;
    public static void Main()
    {
        _hookID = SetHook(_proc);
        Application.Run();
        UnhookWindowsHookEx(_hookID);
        Application.Exit();
    }
    private static IntPtr SetHook(LowLevelMouseProc proc)
    {
        using (Process curProcess = Process.GetCurrentProcess())
        using (ProcessModule curModule = curProcess.MainModule)
        {
            return SetWindowsHookEx(WH_MOUSE_LL, proc,
                GetModuleHandle(curModule.ModuleName), 0);
        }
    }
    private delegate IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam);
    private static IntPtr HookCallback(
        int nCode, IntPtr wParam, IntPtr lParam)
    {
        int nodeCount;
        LinkedListNode<StringBuilder> nodefirst = new LinkedListNode<StringBuilder>(null);
        LinkedListNode<StringBuilder> nodeprev = new LinkedListNode<StringBuilder>(null);
        LinkedList<StringBuilder> windowlist = new LinkedList<StringBuilder>();

        if (nCode >= 0 &&
            MouseMessages.WM_LBUTTONDOWN == (MouseMessages)wParam)
        {
            MSLLHOOKSTRUCT hookStruct = (MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));
            Console.WriteLine(hookStruct.pt.x + ", " + hookStruct.pt.y);
           IntPtr hwnd = GetForegroundWindow();
           StringBuilder windowtitle = new StringBuilder();
           if(GetWindowText(hwnd, windowtitle, 2000)>0)
           Console.WriteLine(windowtitle);
           //Console.WriteLine(nodeCount);
           if (nodeCount == 0)
           {
               nodefirst = windowlist.AddFirst(windowtitle);
               nodeCount++;
           }
           else
           {
               if (nodeCount == 1)
               {
                   nodeprev = windowlist.AddAfter(nodefirst, windowtitle);
                   nodeCount++;
               }
               if (nodeCount > 1)
               {
                   nodeprev = windowlist.AddAfter(nodeprev, windowtitle);
                   nodeCount++;
               }
           }
        }
        return CallNextHookEx(_hookID, nCode, wParam, lParam);
    }
    private const int WH_MOUSE_LL = 14;
    private enum MouseMessages
    {
        WM_LBUTTONDOWN = 0x0201,
        WM_LBUTTONUP = 0x0202,
        WM_MOUSEMOVE = 0x0200,
        WM_MOUSEWHEEL = 0x020A,
        WM_RBUTTONDOWN = 0x0204,
        WM_RBUTTONUP = 0x0205
    }
    [StructLayout(LayoutKind.Sequential)]
    private struct POINT
    {
        public int x;
        public int y;
    }
    [StructLayout(LayoutKind.Sequential)]
    private struct MSLLHOOKSTRUCT
    {
        public POINT pt;
        public uint mouseData;
        public uint flags;
        public uint time;
        public IntPtr dwExtraInfo;
        IntPtr hwnd;
    }
    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr SetWindowsHookEx(int idHook,
        LowLevelMouseProc lpfn, IntPtr hMod, uint dwThreadId);
    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool UnhookWindowsHookEx(IntPtr hhk);
    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode,
        IntPtr wParam, IntPtr lParam);
    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr GetModuleHandle(string lpModuleName);
    [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
    public static extern IntPtr GetForegroundWindow();
    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);
    }
  }

不过，当我不使用低级钩子，只使用Thread.sleep（5000）并保持每5秒获取一次活动窗口名称时，它不会崩溃。请帮我找出原因。请帮帮我。