Updating the using keyword was specifically for templates, and (as was pointed out in the accepted answer) when you are working with … So you usually use using for classes that require … · user kokos answered the wonderful hidden features of c# question by mentioning the using keyword. Using calls dispose() after the using -block is left, even if the code throws an exception. As far as i can tell, using() is just more convenient … 7. 1. 3. 2 a typedef-name can also be introduced by an … · in c++11, the using keyword when used for type alias is identical to typedef. Can you elaborate on that? · in a mysql join, what is the difference between on and using()?