Get a subset of lines from a big text file using PowerShell v2

Question

I\'m working with a big text file, I mean more than 100 MB big, and I need to loop through a specific number of lines, a kind of subset so I\'m trying with this,

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Answer 1

The below is working for me. It extract all the content between 2 lines.

$name     = "MDSinfo"
$MDSinfo  = "$PSScriptRoot\$name.txt" #create text file
$MDSinfo  = gc $MDSinfo

$from =  ($MDSinfo | Select-String -pattern "sh feature" | Select-Object LineNumber).LineNumber
$to =  ($MDSinfo  | Select-String -pattern "sh flogi database " | Select-Object LineNumber).LineNumber

$i = 0
$array = @()
foreach ($line in $MDSinfo)
{
foreach-object { $i++ }
    if (($i -gt $from) -and ($i -lt $to))
    {
    $array += $line      
    }
}
$array