How do I re-initialize variables to their default values?

I have a class that contains some properties.  I want to have a method called Clear() that resets the properties to their default values (as in when the object is first instantiated).  I want it to be clear that the properties are un-initialized at that point and don't just contain an empty string or an int value like 0 or -1.  Any help would be greatly appreciated.




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