Discards log messages. Used mainly for debugging and benchmarking.

Platforms Supported: All

<targets>
  <target xsi:type="Null" name="String" formatMessage="Boolean" layout="Layout" />
</targets>

Read more about using the Configuration File.

• name - Name of the target.

• formatMessage - Indicates whether to perform layout calculation. Boolean Default: False

• layout - Layout used to format log messages. Boolean Required. Default: ${longdate}|${level:uppercase=true}|${logger}|${message:withexception=true}

This example is useful for testing the performance of the NLog engine. Logging rule without any writeTo= option is much faster way to do filtering (Zero allocation).

<targets>
  <target xsi:type="Null" name="BlackHole" formatMessage="false"  />
</targets>
<rules>
   <!-- ignore events written that are written to a logger which starts with "Namespace." -->
   <logger name="Namespace.*" minlevel="Debug" writeTo="BlackHole" final="true" />     
</rules>