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  The namespace name is a long-lived and unchanging identifier. As organizations evolve, changes should not make the namespace name obsolete..
  For example, if you were writing a library of special controls to be used by Windows forms application developers, you should not introduce a type named Checkbox because a type with this name already exists for the application model (CheckBox).
  For example, do not use Directory as a type name because this would conflict with the Directory type.
  For more information on design guidelines, see the "Framework Design Guidelines: Conventions, Idioms, and Patterns for Reusable .NET Libraries" book by Krzysztof Cwalina and Brad Abrams, published by Addison-Wesley, 2005.