Re: Assignment to this.

I think what you want will be covered by overloaded constructors. They are 
mentioned in the wiki. Basically, the idea is to allow the definition of 
methods that are called like a constructor. But they are normal methods, and 
so might do something else, like return an existing instance, null (provided 
the type allows it), ... It's especially useful when you discover you need 
this behaviour but you don't want to change the API for clients.

Daniel


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