Get-AppPool.ps1

<#
.Synopsis

   Get IIS application pool status
.DESCRIPTION

   The function would provide IIS application pool status
.EXAMPLE

   Get-AppPool -Server server1,server2 -Pool powershell


.FUNCTIONALITY

   It uses Microsoft.Web.Administration assembly to get the status
#>

function Get-AppPool {

  [CmdletBinding()]

  param
  (

    [string[]]$Server,
    [String]$Pool

  )

#region loadAssembly 

[Reflection.Assembly]::LoadWithPartialName('Microsoft.Web.Administration')

#endregion loadAssembly

foreach ($s in $server)

{
  
$sm = [Microsoft.Web.Administration.ServerManager]::OpenRemote($s)

$apppools = $sm.ApplicationPools["$pool"]

$status = $apppools.state


      $info = @{
        'Pool Name'=$pool;
        'Status'=$status;
        'Server'=$S;
      }

      Write-Output (New-Object –Typename PSObject –Prop $info)
      
      }

      
    }