http://www.c-sharpcorner.com/news/net-interview-questions-and-answer-practical-implementation
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https://www.sig.eu/en/building-maintainable-software/
It’s all java but the principles are all the same for C# – contains quite a few really good examples of refactoring/refining code.
Not sure how long this will last
http://tinyurl.com/bkg9uqr
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