title: Insert timestamp into filename when exporting into .csv
body: <p>I am trying to insert the <strong>timestamp into the filename</strong> of an output file generated by PowerShell scrip.</p>
  
  <p>So instead of <code>filelist.csv</code>, it names the output file with the actual timestamp (of the outpufile's modification time), like <code>YYYYMMDD_HHMMSS_filelist.csv</code>.</p>
  
  <pre><code>Get-childitem -recurse -file | select-object @{n="Hash";e={get-filehash -algorithm MD5 -path $_.FullName | Select-object -expandproperty Hash}},lastwritetime,length,fullname | export-csv filelist.csv -notypeinformation
  </code></pre>
  
  <p>Any suggestions as to what is the missing code from the above line for timestamping the output file?</p>