I have a similar setup with my current project and unit tests, my NLog output goes to \ UnitTests \ bin \ Debug \ Logs. The logger is configured as follows in NLog.config (this creates a daily log file):
<target name="FileLog" xsi:type="File" fileName="${basedir}/logs/${shortdate}_log.txt"
NLog, throwExceptions, internalLogLevel internalLogFile NLog.config :
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
throwExceptions="true"
internalLogLevel="Debug"
internalLogFile="nlog_log.log">
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