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();

        }