the first line output nothing in powershell - powershell

Question

i try output parameter value in PowerShell, but it output nothing for the first time.
i have to try multiple times and it always succeeds after the first output.
does anyone know the problem?
here is the code test.ps1:
Get-Content D:/Config.txt | Foreach-Object{
$var = $_.Split('=')
New-Variable -Name $var[0] -Value $var[1]
}
Write-Host $DeskTopPath -BackgroundColor black
Write-Host $DeskTopPath -BackgroundColor green
Write-Host $DeskTopPath -BackgroundColor blue
Config.txt
DeskTopPath=D:\Users\Test\Desktop
my output
D:\Users\Test\Desktop
D:\Users\Test\Desktop
my PowerShell version: 5.1.14393.3471

Answer 1

Write-Host writes to the console immediately. It doesn’t wait for or care about what the pipeline is processing. It is simply executing too fast before your variable is created. You either need to add a sleep or delay or don’t use Write-Host.
Get-Content D:/Config.txt | Foreach-Object{
$var = $_.Split('=')
New-Variable -Name $var[0] -Value $var[1]
}
Start-Sleep -m 200
Write-Host $DeskTopPath -BackgroundColor black
Write-Host $DeskTopPath -BackgroundColor green
Write-Host $DeskTopPath -BackgroundColor blue
This isn't reproducible for everyone because of the number of variables involved in running PowerShell code. It will have to be trial and error.