Convert script powershel to c#

Hello

 I have convert the script powershell to c# code:

$web = Get-SPWeb "https://intranet.oursite.com/"
$list =$web.GetList("/sites/test/Lists/Order")
$view = $list.Views["ScriptTest"]
$exportlist = $null
$exportlist = @()
$items = $list.GetItems($view) | Group-Object Title

$items | select @{name="Title"; expression={$_.name}}, @{name="Quantity"; expression={($_.Group | select @{name="q"; expression={$_['ItemQuantity']}}  | measure q -sum).sum }}

Thanks