Check out this code and try to find the problem:
$desc = Get-Process -Id $pid | Select-Object -Property Description "PowerShell process description: $desc"
This code gets the PowerShell host process and reads the process description, then outputs it in a string. The result looks weird:
This is because the code has selected the entire property Description, and the result is not just the string description, but also the property:
Whenever you select just one property, make sure you use -ExpandProperty instead of -Property. It gets rid of the property column, and the string now looks just fine:
