PowerShell to get .NET framework version that a site is running in IIS

Question

Is there a way to use PowerShell to get the .NET framework that a web application is running on in IIS?

I have been able to use the following to get the website name and to see that the app pool is set up as "Clr4IntegratedAppPool," but I am not seeing a way to determine what version of .NET the site itself is running.

To clarify, I am trying to get the .NET version of the site itself, not the app pool. For example if Site1 is running version 4.6.2 under AppPool1 (which is set to 4.0) then I am trying to get to the 4.6.2.

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

$sm = New-Object Microsoft.Web.Administration.ServerManager

foreach($site in $sm.Sites)
{
    $root = $site.Applications | where { $_.Path -eq "/" }
    Write-Output ("Site: " + $site.Name + " | Pool: " + $root.ApplicationPoolName )
}

Answer 1

Here is a way to do it

$myServer = "name of server"

$IIS = [Microsoft.Web.Administration.ServerManager]::OpenRemote($myServer)

foreach ($pool in $IIS.ApplicationPools)
{
    $pool.ManagedRuntimeVersion
}

Answer 2

You can go to the bin folder of the site to iterate all dlls and identify the .NET framework version of those dlls.

Function Get-WebsiteDotNetVersion { 
    [CmdletBinding()] 
    Param 
    ( 
        [Parameter(Mandatory=$false)][String]$SiteName 
    ) 

    # get site root directory 
    $site = Get-WebSite -Name $SiteName 
    $binLocation = "$($site.physicalPath)\bin" 

    # get all dlls in bin folder 
    $dllFolder = Get-Item -Path $binLocation 
    $dlls = $dllFolder.GetFiles("*.dll") 

    # analyze dll .net version 
    $set = New-Object System.Collections.Generic.HashSet[String] 
    $dlls | ForEach-Object { 
        $set.Add([Reflection.Assembly]::ReflectionOnlyLoadFrom("$binLocation\$($_.Name)").ImageRuntimeVersion) | Out-Null 
    } 

    # print all dll .NET version 
    $set 
} 

For details please refer to How to get .NET framework version of site running in IIS by PowerShell

Answer 3

An asp.net application looks at target framework attribute to find out which version of .Net to use

<httpRuntime targetFramework="4.5" />

For more details refer this msdn .If it does not have that attribute set,It will use runtime 4.0

So to correctly figure out the site version, you need

• Get the Application pool runtime version.
• Go to the web.config file and check if targetFramework is present.
  • If targetFramework is present ,take that
  • If not,use the Application pool . Runtime

Hope this helps!