我觉得这是一个简单的问题，所以我认为我失去了一些东西明显。我真的不用不完preprocessor指令，但我一直在寻找某人code这做，并认为这是我应该熟悉。

I think this is a simple question so I assume I'm missing something obvious. I don't really ever use preprocessor directives but I was looking at someones code which did and thought it was something I should be familiar with.

所以，我看了看MSDN的例子这里它具有code：

So I looked at the msdn example here it has the code:

#define DEBUG
// ...
#if DEBUG
    Console.WriteLine("Debug version");
#endif

我的两个问题是：

My two questions are:

在上面为什么他们定义DEBUG的例子吗？我是在被你的调试v编译设置IM pression。释放模式？ 在看它有的#define MYTEST ，然后如果它定义写入控制台依赖，但这是如何从只使用一个变量不同的另一个例子？我是什么在这里失踪？ in the example above why do they define DEBUG? I was under the impression that was set if you compile in debug v. release mode? looking at the other example which has #define MYTEST and then writes to the console dependent on if it 'defined', but how does this differ from just using a variable? What am I missing here?

感谢

推荐答案

我真的建议使用条件属性，而不是行内的#if语句。

I would actually recommend using the Conditional Attribute instead of inline #if statements.

[Conditional("DEBUG")]
private void DeleteTempProcessFiles()
{
}

这不仅是更清洁和更容易阅读，因为你最终不会有＃如果，#else伪在您的code。此样式是不易出错或者在正常code编辑和以及逻辑流误差。

Not only is this cleaner and easier to read since you don't end up having #if, #else within your code. This style is less prone to errors either during normal code edits and well as logic flow errors.