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User kokos answered the wonderful Hidden Features of C# question by mentioning the using keyword. Can you elaborate on that? What are the uses of using?

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243 What is the logic behind the "using" keyword in C++? It is used in different situations and I am trying to find if all those have something in common and there is a reason why the "using" keyword is used as such.

Updating the using keyword was specifically for templates, and (as was pointed out in the accepted answer) when you are working with non-templates using and typedef are mechanically identical, so the choice is totally up to the programmer on the grounds of readability and communication of intent.

Using the using keyword can be useful. Using using helps prevent problems using exceptions. Using using can help you use disposable objects more usefully. Using a different using helps you use namespaces or type names. Quite useful.

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