ForEach-Object $_ Variable not working as expected - powershell

Question

I am trying to get the real names of each user in an AD group, I have created it to the point of getting the output to show the User IDs of each member in the group but then trying to do a net user $_ /domain on each user in the .txt file it gives me errors like there is nothing there. Before the onslaught of "why dont you just use Get-AD*" I understand that its out there, but we cannot install that module here. I need something other people can use without installing things.
I have tried a few ways to approach this and the below code is the part of the script that doesnt seem to be working correctly. I have the other way I tried it commented out but left it there as another possible starting point.
function Return-DropDown {
$Choice = $DropDown.SelectedItem.ToString()
if ($Choice)
{
net group $Choice /domain > C:\Temp\RawOut.txt
$UserID = Get-Content 'C:\Temp\RawOut.txt'
$UserID[($UserID.IndexOf('-------------------------------------------------------------------------------') + 1) .. ($UserID.IndexOf('The command completed successfully.') -1)] > C:\Temp\RawIDs.txt
Start C:\Temp\RawIDs.txt
Remove-Item C:\Temp\RawOut.txt
Get-Content -path C:\Temp\RawIDs.txt | ForEach-Object {net user $_ /domain | findstr "Full Name"} >> C:\Temp\$Choice+RealNames.txt
#$RealNames = Get-Content -path C:\Temp\RawIDs.txt
#ForEach ($_ in $RealNames)
#{
# net user $_ /domain >> C:\Temp\$Choice+1.txt
# }
}
}
What I am getting back is:
net : The syntax of this command is:
At C:\Users\MyID\OneDrive - MyCompany\AD Group DropDown.ps1:34 char:64
+ ... path C:\Temp\RawIDs.txt | ForEach-Object {net user $_ /domain} >> C:\ ...
+ ~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (The syntax of this command is::String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
NET USER
[username [password | *] [options]] [/DOMAIN]
username {password | *} /ADD [options] [/DOMAIN]
username [/DELETE] [/DOMAIN]
username [/TIMES:{times | ALL}]
username [/ACTIVE: {YES | NO}]
Let me know any advice for getting this function to work.

Answer 1

Thank you to #LotPings for helping me out with finding a solution.
I discovered (through looking at a post LotPings commented) that I was getting the output in a format that was causing an error. My txt file was formatted:
User1 User2 User3
User4 User5 User6
...
And it was trying to take the full line User1 User2 User3 as the variable. Which was obviously not working. with using a -replace and -split to get the format right for my variable and it's working now.
function Return-DropDown {
$Choice = $DropDown.SelectedItem.ToString()
if ($Choice)
{
net group $Choice /domain > C:\Temp\RawOut.txt
$UserID = Get-Content 'C:\Temp\RawOut.txt'
$UserID[($UserID.IndexOf('-------------------------------------------------------------------------------') + 1) .. ($UserID.IndexOf('The command completed successfully.') -1)] > C:\Temp\RawIDs.txt
#Start C:\Temp\RawIDs.txt
Remove-Item C:\Temp\RawOut.txt
$results = Get-Content -path C:\Temp\RawIDs.txt
foreach($result in $results) {
($result -replace '\s+',',') -split ',' | ? { $_ } >> 'C:\temp\users.txt'
}
Get-Content -path C:\Temp\users.txt | ForEach-Object {net user $_ /domain | findstr "Full Name"} >> C:\Temp\$Choice.txt
Remove-Item C:\Temp\users.txt
Remove-Item C:\Temp\RawIDs.txt
Start C:\Temp\$Choice.txt
}
}