Sample PowerShell Compare-Object

    #Verify backup file exists
    If(-not (Test-Path $outputpath))
    {
        $CustomErrorMessage = "Error creating backup file at " + $outputpath + "`n`n" + "Verify backup path is correct, backup location is available, and that your account has write permission."
        Write-Host $CustomErrorMessage
        EmailError($CustomErrorMessage)
        Continue #Exits the ForEach loop
    }

    #Compare Downloaded File to last existing backup and only keep if different (so you don't have a hundred copies of the same file)
    #Get latest file (excluding the one just downloaded)
    $lastbackupfile = $(Get-ChildItem -Path $outputfolder | Sort-Object LastWriteTime -Descending | Select-Object -Index 1)
    $lastbackupfilepath = $outputfolder + $lastbackupfile
    Try
    {
        If($null -ne $lastbackupfile) #make sure that there actually is an existing backup to compare to
        {
            if(-NOT(Compare-Object -ReferenceObject $(Get-Content $outputpath) -DifferenceObject $(Get-Content $lastbackupfilepath)))
            {
                #Files are the same; no need to keep backup
                Remove-Item -Path $outputpath
                Write-Host("No Changes to Configuration for Switch " + $line.hostname + ".")
            }
            Else
            {
                #Files are different; keep latest backup
                Write-Host New Backup File Created: $outputpath
            }
        }
        else
        {
            #If no previous backup file; keep latest backup
            Write-Host New Backup File Created: $outputpath
        }
    }
    Catch
    {
        $CustomErrorMessage = "Error Comparing previous config for switch " + $line.hostname + "`n`n" + "Error Message is: " + $_.Exception.Message + "`n`n" + "If the object is null it may be you have an empty file in the directory."
        Write-Host $CustomErrorMessage
        EmailError($CustomErrorMessage)
        Continue #Exits the ForEach loop
    }