我也支持NLog，因为它也可以处理非托管代码。 我认为可以同时使用log4net和log4cxx，但是NLog同时处理托管和非托管代码。

我还看了Common。日志，一个对日志api进行抽象的facade，它支持log4net, NLog和enterprise Library。我不认为我会使用它，但我喜欢他们如何使用lambdas来提高日志记录被禁用时的性能(一个与NLog和其他可能共享的特性)。

一个没有被过多讨论的关键考虑因素是支持和更新。

Log4Net自2006年4月19日发布1.2.10版本以来就没有更新过。

相比之下，NLog自2006年以来一直被积极支持，不久将发布NLog 2.0，支持许多在log4net上次更新时还不存在的平台，例如:

NET Framework 2.0 SP1及以上版本，3.5 & 4.0(客户端和扩展配置文件) Silverlight 2.0, 3.0, 4.0 .NET紧凑框架2.0,3.5 Mono 2。x档案

由于最近使用过这两个框架，我想我可以分享一下我对这两个框架的看法。

我被要求评估现有web应用程序的日志框架，在浏览了各种在线论坛后，我将选择范围缩小到NLog (v2.0)和log4net (v1.2.11)。以下是我的发现:

Setting/starting up with NLog is dead easy. You go through the Getting started tutorial on their website and you are done. You get a fair idea, how thing might be with nlog. Config file is so intuitive that anyone can understand the config. For example: if you want to set the internal logging on, you set the flag in Nlog config file's header node, which is where you would expect it to be. In log4net, you set different flags in web.config's appSettings section. In log4net, internal logging doesnt output timestamp which is annoying. In Nlog, you get a nice log with timestamps. I found it very useful in my evaluations. Filters in log4net - You better check my this question - log4net filter - how to write AND filter to ignore log messages and if you find an answer/solution for this, please let me know. I understand, there is a workaround for this question, as you can write your own custom filter. But something which is not easily available in log4net. Performance - I logged around 3000 log messages to database using a stored procedure. I used simple for loop (int i=0; i<3000; i++... to log the same message 3000 times. For the writes: log4net AdoAppender took almost double the time than NLog. Log4net doesnt support asynchronous appender.

经过比较，我选择了NLog作为日志框架。:)

正如我注意到的那样，log4net在应用程序运行的整个过程中都会锁定它们的输出文件，因此不能删除它们。除此之外，它们是相似的。

所以我更喜欢NLog。

我赞同上面的方法，并且更喜欢nLog。Entlib不必要地膨胀。

有一件事总是让我与Log4net忘记添加以下到全局。Asax初始化组件:

log4net.Config.XmlConfigurator.Configure();

您也可以考虑Microsoft企业库日志记录块。它有很好的设计师。