Output ALL results at the end of foreach instead of during each run - powershell

Question

I inherited a script which loops through a set of servers in a server list and then outputs some stuff for each one. It uses StringBuilder to append stuff to a variable and then spits out the results...how do I get the script to store the contents so I can display it at the VERY end with the results of the entire foreach instead of having it print (and then overwrite) on each iteration?
Currently my results look like this:
ServerName1
Text1
Next run:
ServerName2
Text 2
How do I get it to store the data and then output the following at the end so I can email it?
ServerName1
Text1
ServerName2
Text2
My code:
foreach($Machine in $Machines)
{
Invoke-Command -ComputerName $Machine -ScriptBlock{param($XML1,$XML2,$XML3,$URL)
[System.Text.StringBuilder]$SB = New-Object System.Text.StringBuilder
$X = $SB.AppendLine($env:COMPUTERNAME)
if (Test-Path <path>)
{
$PolResponse = <somestuff>
$PolResponse2 = <somestuff>
Write-Host "[1st] $PolResponse" -ForegroundColor Magenta
Write-Host "[2nd] $PolResponse2" -ForegroundColor Magenta
$X = $SB.AppendLine($PolResponse)
$X = $SB.AppendLine($PolResponse2)
}
else
{
$PolResponse = "[1st] No Response"
$PolResponse2 = "[2nd] No Response"
Write-Host $PolResponse -ForegroundColor Red
Write-Host $PolResponse2 -ForegroundColor Red
$X = $SB.AppendLine($PolResponse)
$X = $SB.AppendLine($PolResponse2)
}
} -ArgumentList $XML1, $XML2, $XML3, $URL
}
# Sending result email
<<I want to send the TOTALITY of $SB here>>

Answer 1

You can start by moving the StringBuilder variable declaration outside of the for loop (prior to it)
[System.Text.StringBuilder]$SB = New-Object System.Text.StringBuilder
then FOR LOOP

Answer 2

I don't know if this will be a good solution for what you're asking for or not, but what you could do is create a txt file and every loop in the foreach loop add the information to a txt file. This is one way to store all of the information and then have all of it together at the end.
New-Item -Path "\\Path\to\file.txt" -Itemtype File
Foreach(){
$Stuff = # Do your stuff here
Add-Content -Value $stuff -Path "\\Path\to\file.txt"
}
# Email .txt file ?
# You could use Send-MailMessage to do this possibly
Hopefully this can be helpful for your goal.