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What is the dependency inversion principle and why is it important?

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How exactly does DIP do that, for Java or .NET code? In those languages, contrary to C++, changes to the implementation of a low-level module do not require changes in the high-level modules that use it. Only changes in the public interface would ripple-through, but then the abstraction defined at the higher level would also have to change.
– Rogério
Commented Aug 30, 2009 at 22:01

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What is the dependency inversion principle and why is it important?

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