How to programmatically determine installed IIS version

Question

What would the preferred way of programmatically determining which the currently installed version of Microsoft Internet Information Services (IIS) is?

I know that i

Answer 1

I did it this way (using Powershell):

function Validate-IISVersion([switch] $ContinueOnError = $false)
{
if ($ContinueOnError)
{ $ErrorActionPreference = "SilentlyContinue" }
else
{ $ErrorActionPreference = "Stop" }

# Using GAC to ensure the IIS (assembly) version
$IISAssembly = [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.Web.Administration")
$IISVersion = $IISAssembly.GetName().Version
$IISVersionString = [string]::Format("{0}.{1}.{2}.{3}", $IISVersion.Major, $IISVersion.Minor, $IISVersion.Build, $IISVersion.Revision)
if (!$IISVersionString.Equals("7.0.0.0"))
{
    if ($ContinueOnError)
    {
        Write-Host  "`nConflicting IIS version found! [Version: $IISVersionString]`t    " -NoNewline -ForegroundColor Red
    }
    Write-Error "Conflicting IIS version found [$IISVersionString]! @ $(Split-Path $MyInvocation.ScriptName -leaf)"
    return $false
}
else
{
    return $true
}
}