Remove blank lines in powershell output
Try this instead:
($OSInfo ` | Format-List ` @{Name="OS Name";Expression={$_.Caption}}, @{Name="OS Boot Time";Expression={$_.ConvertToDateTime($_.LastBootUpTime)}}, @{Name="OS Install Date";Expression={$_.ConvertToDateTime($_.InstallDate)}} ` | Out-String).Trim()That'll clean up all the extraneous blank lines produced by Format-List. You may need to insert a couple of your own that you get to control.
Just to add a remark, because I see this being done all the time, even now - Format-List and Format-Table should only be used to output text in the console.
If you have objects to output as text files, CSV etc, then you simply should Select-Object to grab the objects you want rather than ft or fl. Then you can apply your Out-String if text formatting is required.
The above example should be:
($OSInfo `| Select-Object ` @{Name="OS Name";Expression={$_.Caption}}, ... `| Out-String).Trim()