Having trouble running easy Get-ADGroupMember script.

Here is my script:

$groups = Get-Content C:\Scripts\Adgroups.txt
foreach($Group in $Groups) {            

Get-ADGroupMember -Id $Group | select  @{Expression={$Group};Label="Group Name"},Name | Export-CSV C:\Scripts\GroupMembersProd.CSV -NoTypeInformation


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When I run it I either get:

Get-ADGroupMember : Cannot bind parameter 'Identity' to the target. Exception setting "Identity": "Cannot validate argument on parameter: 'Identity'. The argument is null or empty. Supply an argument that is not null or empty and then try the command

Or my CSV only has the members to the last group in my text file.
Chad FranksSenior System EngineerAsked:
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Probably your input file will have empty lines.. Change first line of code to following..
$groups = Get-Content C:\Scripts\Adgroups.txt | ?{$_ -ne $null -and $_.trim()  -ne ""}

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Also Export-csv should be outside the foreach loop, updated code follows..
Get-Content C:\Scripts\Adgroups.txt | ?{$_ -ne $null -and $_.trim() -ne ""} | %{
 $Group = $_ 
 Get-ADGroupMember -Id $Group | 
 select  @{Expression={$Group};Label="Group Name"},Name
} | Export-CSV C:\Scripts\GroupMembersProd.CSV -NoTypeInformation

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Chad FranksSenior System EngineerAuthor Commented:
That worked perfectly.  Thanks!
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