The environment variable like USERNAME, TMP, USERPROFILE, COMPUTERNAME, PROCESSOR_ARCHITECTURE etc.

Platforms Supported: All

${environment:variable=String}

• variable - Name of the environment variable. Required. Examples: USERNAME, TMP, USERPROFILE, COMPUTERNAME, PROCESSOR_ARCHITECTURE etc.

• For better performance then consider to combine with cached=true. Thus only resolving environment-variable value only once, but then not react to any changes of the environment variable.

• This Layout Renderer outputs environment variables, and NOT properties from System.Environment

• To list all environment variables in your system:

  • Open Command Prompt (cmd) and execute the command set
  • Open PowerShell and execute the command dir env:
  • System.Environment.GetEnvironmentVariables()

log file for 32 bits systems in folder 32 and otherwise in folder 64

<target 
   xsi:type="File"
   name="file1" 
   fileName="c:\temp\${when:when='${environment:PROCESSOR_ARCHITECTURE:cached=true}'='X86':inner=32:else=64}\file.log" />