获取快捷方式指向的地址

1 string fileName = openFileDialog1.FileName.ToString();
2                  string dirPath = "C:\\";
3                 string ext = fileName.Substring(fileName.LastIndexOf(".")) ;
4                 if (ext == ".lnk")
5                 {
6                     IWshRuntimeLibrary.WshShell shell = new IWshRuntimeLibrary.WshShellClass();
7                     IWshRuntimeLibrary.IWshShortcut shortcut = (IWshRuntimeLibrary.IWshShortcut)shell.CreateShortcut(fileName);
8                     dirPath = shortcut.TargetPath;
9                 }