Find and replace a string with multiple string in a loop line by line

To have four rotational classes count lines and do a modulus division %
and use a switch command.

$file = Get-Content "C:\Users\admin\Desktop\n\2.html"

$cnt=0
ForEach ($line in $file){
    if ($line -match '^\<tr\>') {
        switch ($cnt) {
            0 {$line -replace '\<tr\>','<tr class="danger">'}
            1 {$line -replace '\<tr\>','<tr class="warning">'}
            2 {$line -replace '\<tr\>','<tr class="active">'}
            3 {$line -replace '\<tr\>','<tr class="success">'}
        }
        $cnt++
        $cnt%=4
    } else {
        $line
    }
}

Or put the classes in an array and insert by index:

$file = Get-Content "C:\Users\admin\Desktop\n\2.html"
$classes = ('danger','warning','active','success')
$cnt=0
ForEach ($line in $file){
    if ($line -match '^\<tr\>') {
        $line -replace '\<tr\>', ('<tr class="'+$($classes[$cnt])+'">')
        $cnt++
        $cnt%=4
    } else {
        $line
    }
}