Console.WriteLine在ASP.NET中位于何处？
本文翻译自：Where does Console.WriteLine go in ASP.NET?
In a J2EE application (like one running in WebSphere), when I use System.out.println() , my text goes to standard out, which is mapped to a file by the WebSphere admin console. 在一个J2EE应用程序中（就像在WebSphere中运行的应用程序一样），当我使用System.out.println() ，我的文本进入标准输出，该标准输出由WebSphere管理控制台映射到文件。
In an ASP.NET application (like one running in IIS), where does the output of Console.WriteLine() go? 在ASP.NET应用程序（如在IIS中运行的应用程序）中， Console.WriteLine()的输出在哪里？ The IIS process must have a stdin, stdout and stderr; IIS进程必须具有stdin，stdout和stderr。 but is stdout mapped to the Windows version of /dev/null or am I missing a key concept here? 但是stdout映射到Windows版本的/ dev / null还是在这里缺少关键概念？
I'm not asking if I should log there (I use log4net), but where does the output go? 我不是问我是否应该登录那里（我使用log4net），但是输出会去哪里呢？ My best info came from this discussion where they say Console.SetOut() can change the TextWriter , but it still didn't answer the question on what the initial value of the Console is, or how to set it in config/outside of runtime code. 我最好的信息来自这个讨论 ，他们说Console.SetOut()可以更改TextWriter ，但是它仍然没有回答关于Console初始值是什么，或者如何在运行时的config / outside中设置它的问题。码。
#1楼
参考：https://stackoom.com/question/ZoK/Console-WriteLine在ASP-NET中位于何处
#2楼
在ASP.NET应用程序中，我认为它会转到在调试过程中可见的“输出”或“控制台”窗口。
#3楼
Unless you are in a strict console application, I wouldn't use it, because you can't really see it. 除非您使用严格的控制台应用程序，否则我不会使用它，因为您看不到它。 I would use Trace.WriteLine() for debugging-type information that can be turned on and off in production. 我将使用Trace.WriteLine（）获得可在生产环境中打开和关闭的调试类型信息。
#4楼
There simply is no console listening by default. 默认情况下，根本没有控制台监听。 Running in debug mode there is a console attached, but in a production environment it is as you suspected, the message just doesn't go anywhere because nothing is listening. 在调试模式下运行时，连接了一个控制台，但是在生产环境中，正如您所怀疑的那样，该消息不会随处可见，因为没有人在听。
#5楼
If you look at the Console class in .NET Reflector , you'll find that if a process doesn't have an associated console, Console.Out and Console.Error are backed by Stream.Null (wrapped inside a TextWriter ), which is a dummy implementation of Stream that basically ignores all input, and gives no output. 如果查看.NET Reflector中的Console类，则会发现如果进程没有关联的控制台，则Stream.Null （包装在TextWriter ）将支持Console.Out和Console.Error Stream的虚拟实现，基本上忽略所有输入，并且不提供任何输出。
So it is conceptually equivalent to /dev/null , but the implementation is more streamlined: there's no actual I/O taking place with the null device. 因此，它在概念上等效于/dev/null ，但是实现更加简化：空设备没有实际的I / O发生。
Also, apart from calling SetOut , there is no way to configure the default. 此外，除了调用SetOut ，无法配置默认值。
#6楼
System.Diagnostics.Debug.WriteLine(...); gets it into the Immediate Window in Visual Studio 2008. 将其放入Visual Studio 2008中的“ 立即窗口” 。
Go to menu Debug -> Windows -> Immediate : 转到菜单调试 -> Windows- > 立即 ：