NLog 相关

1、关于Windows
Service 中使用NLog无法生成日志文件的问题

解决方案：“
For anyone looking at this thread in the future, another reason to not see output is if you do not specify the directory on the file. 
ex:  <target name="file" fileName="log_NLog.log" xsi:type="File" layout="${date} ${message}"/>
When a windows service starts up, the current directory is windows\system32 (or the equivalent).  Look in this directory for output.  To solve this problem, specify the directory 
ex:  <target name="file" fileName="${basedir}/log_NLog.log" xsi:type="File" layout="${date} ${message}"/>”。

from:
http://stackoverflow.com/questions/858597/why-wont-my-windows-service-write-to-my-log-file http://nlog-forum.1685105.n2.nabble.com/Nlog-not-working-with-Windows-service-td6711077.html#a6825698