Powershell Runspace - return combined results

Ive seen code similar to this below but, all the examples just create files.

My question is how do I return the combined $diskinfoC to a single variable?
Thanks!


$Scriptblock = {
param($Computername)
$diskinfoC = Invoke-Command -ComputerName $computername -Credential $creds -scriptblock {Get-PSDrive C} | Select-Object PSComputerName,Used,Free
return $diskinfoC
}

$MaxThreads = 5
$RunspacePool = [runspacefactory]::CreateRunspacePool(1, $MaxThreads)
$RunspacePool.Open()
$Jobs = @()
$alldisks=@()

$computers = “computer1”,“computer2”,“computer3”
Foreach($computer in $computers){
$PowerShell = [powershell]::Create()
$PowerShell.RunspacePool = $RunspacePool
$PowerShell.AddScript($ScriptBlock).AddArgument($_)
$Jobs += $PowerShell.BeginInvoke()

}

while ($Jobs.IsCompleted -contains $false) {
Start-Sleep 1
}

If I run just the $diskinfoC = Invoke-command -computerName $computername -scriptblock{get-PSDriveC} command it works.

But, this doesnt
$Scriptblock = {
param($Computername)
$diskinfoC = Invoke-Command -ComputerName $computername -scriptblock {Get-PSDrive C} | Select-Object PSComputerName,Used,Free
write-host $diskinfoC
$file = $Computername + “_” + “DiskinfoC.csv”
$diskinfoC | Export-csv .$file -nti
}

$MaxThreads = 5
$RunspacePool = [runspacefactory]::CreateRunspacePool(1, $MaxThreads)
$RunspacePool.Open()
$Jobs = @()
$alldisks=@()

$computers = “computer1”,“computer2”,“Computer3”
Foreach($computername in $computers){

   $PowerShell = [powershell]::Create()
   $PowerShell.RunspacePool = $RunspacePool
   $PowerShell.AddScript($ScriptBlock).AddArgument($computername)
   $Jobs += $PowerShell.BeginInvoke()

}

while ($Jobs.IsCompleted -contains $false) {
Start-Sleep 1
}

I thought it would write files to the local dir but, nothing…

Any guidance appreciated!