C# Extension Method for Object

Question

Is it a good idea to use an extension method on the Object class?

I was wondering if by registering this method if you were incurring a performance penalty as it would b

Answer 1

There will be no performance penalty as it doesn't attach to every type in the system, it's just available to be called on any type in the system. All that will happen is that the method will show on every single object in intellisense.

The question is: do you really need it to be on object, or can it be more specific. If it needs to be on object, the make it for object.