What are the uses of "using" in C#? - Stack Overflow
2017年3月8日 · 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?
PowerShell Syntax $using - Stack Overflow
2020年10月31日 · The Using scope modifier is supported in the following contexts: Remotely executed commands, started with Invoke-Command using the ComputerName, HostName, SSHConnection or …
.net - use of "using" keyword in c# - Stack Overflow
2009年11月20日 · 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 …
What is the C# Using block and why should I use it? [duplicate]
What is the purpose of the Using block in C#? How is it different from a local variable? So the using statement will automatically dispose of the object once that context is complete, WHEN should we …
What is the difference between 'typedef' and 'using'?
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 …
What is the logic behind the "using" keyword in C++?
2013年12月27日 · In C++11, the using keyword when used for type alias is identical to typedef. 7.1.3.2 A typedef-name can also be introduced by an alias-declaration. The identifier following the using …
c# - What is the difference between using and await using ...
2019年10月29日 · using var disposable = new Disposable(); // Do something What is the difference between using and await using? How should I decide which one to use?
MySQL JOIN ON vs USING? - Stack Overflow
2021年2月19日 · 373 In a MySQL JOIN, what is the difference between ON and USING()? As far as I can tell, USING() is just more convenient syntax, whereas ON allows a little more flexibility when the …
difference between ON Clause and using clause in sql
2012年5月3日 · The USING clause: This allows you to specify the join key by name. The ON clause: This syntax allows you to specify the column names for join keys in both tables. The USING clause …
为什么尽量不要使用using namespace std？ - 知乎
2016年5月31日 · 需要保证的是尽量不要在头文件里using任何东西尤其是namespace，要不然include进来的时候很容易莫名其妙产生 命名冲突。有条件的话，所有引入的符号都定义在自己的namespace …