c# windows服务如何获取自己的安装路径

public static string GetWindowsServiceInstallPath(string ServiceName)
        {
            string key = @"SYSTEM\CurrentControlSet\Services\" + ServiceName;
            string path = Registry.LocalMachine.OpenSubKey(key).GetValue("ImagePath").ToString();
            //替换掉双引号   
            path = path.Replace("\"", string.Empty);

FileInfo fi = new FileInfo(path);
            return fi.Directory.ToString();
        }