[c#] Save an instance for future re-instantiation

Hi, this may be a stupid question but I cant find out how to do this...

I need to save the entire instance (or state) of a gameobject in memory to re-instantiate it in a second moment. If I write GameObject tmp = GameObject.Find("/myObject"), o = tmp; Destroy(tmp); in the variable 'o' only goes a REFERENCE of the gameobject, not an instance copy (which is what I need)! So when I write GameObject newInstance = Instantiate(o) as GameObject; it ends in a MisingReferenceException because the former gameobject was destroyed so its instance is no longer present in memory.

Anyone can give me a hint to achieve this task?