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XeeRox

[.net] Private & Access Classes

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Hi guys, i am now readed about "private" in my book, but there isnt showed off one thing.How can give the access to the one class, so it could modify private stuff. :.Example.: ============================================================================ class Spaceship <- CLASS A { private int fuel; <-- private class }; ============================================================================ class Warship : Spaceship <- CLASS B { public void ChangeFuel() { fuel = 10; <-- ERROR, because it dont have access } } ============================================================================ Now, how can i give access to the class B, so he coudl modify the fuel in class A?

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Members which are declared protected can be accessed from classes which derive from the original class.

Parent -> Child1 -> Child2

Child1 and Child2 derive from Parent; they have access to the protected members of Parent. Child2 derives from Child1; it has access to the protected members of Child1.

If you're looking for the "friend" access, wherein you can specify that a particular class, unrelated to another, can access and change the protected variables, it doesn't exist in C#. The closest there is to friend access is "internal" which allows access to any members within the same assembly.

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You can make assemblies "friends" of each other and private otherwise in .NET 2.0, but nothing really at the class level.

~Graham

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