Log.INFO 与 Log.DEBUG

• 调试: 关于程序状态的细粒度语句，通常为 used for debugging;

• 信息: 关于节目状态的信息性陈述, 代表程序事件或行为跟踪;

• 警告: statements that describe potentially harmful events or states in the program;

• 错误: 描述申请中非致命错误的陈述; this level is used quite often for logging handled exceptions;

• 致命: 代表最严重错误条件的说明, assumedly resulting in program termination.

在 http://www.beefycode.com/post/Log4Net-Tutorial-pt-1-Getting-Started.aspx上找到的

I usually try to use it like this:

• DEBUG: Information interesting for Developers, when trying to debug a 问题。
• INFO: 支持人员试图找出给定错误的上下文时感兴趣的信息
• WARN to FATAL: Problems and Errors depending on level of damage.

还要记住，所有 info()、 error()和 debug()日志记录调用都在任何应用程序中提供内部文档。