How to copy an object?

Thank you guys for replies. I tried different ways and found that the most convenient way might be override the Clone method to copy the elements one by one. It seems that C# designers don't think it is a good idea to pass objects. And they give little support for it.

I don't know if Hashtable has a copy constructor, or if it has the Clone method. If it does, then use those. If not, you might want to write your own inherited Hashtable class that does have a copy contructor or a Clone method. At the worst, you could use loops to copy the elements. I don't know if it is helpful. Maybe only worth $0.01...