Outputs log messages through the OutputDebugString Win32 API. That can be monitored using DebugView or Harvester

Platforms Supported: Limited - Requires Windows and since NLog 5.0 then also nuget-package NLog.OutputDebugString

<targets>
  <target xsi:type="OutputDebugString" name="String" layout="Layout" />
</targets>

Read more about using the Configuration File.

• name - Name of the target.

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

  Introduced with NLog 5.0

• footer - Layout used to format footer-output when closing. Layout

  Introduced with NLog 5.0

Alternative targets for diagnostic output:

• Trace-target for output to System.Diagnostics.Trace
• DebugSystem-target for output to System.Diagnostics.Debug
• Debugger-target for output to System.Diagnostics.Debugger.Log