Write-Host -ForegroundColor "Yellow" -Object "`n`r - Checking if $STSPool IIS pool exists ..."
    if($null -eq (Get-IISAppPool $STSPool -WarningAction SilentlyContinue)) {
        New-WebAppPool -Name $STSPool | Out-Null
        Write-Host -ForegroundColor "Green" -Object " - Created new application pool: $STSPool."

        Set-ItemProperty "IIS:\AppPools\$STSPool" -Name "processModel.loadUserProfile" -Value "True"

        Write-Host -ForegroundColor "Yellow" -Object "`n`r - Checking if application $STSAppName exists ..."

        if($null -eq (Get-WebApplication -Name $STSAppName)){
            New-WebApplication -Name "$STSAppName" -Site $iisWebsite -PhysicalPath $STSFolder -ApplicationPool $STSPool | Out-Null
            Write-Host -ForegroundColor "Green" -Object " - Created new web application: $STSAppName."
        } else {
            Write-Host -ForegroundColor "Green" -Object " - Web application: $STSAppName already exists."
        }

        Write-Host -ForegroundColor "Yellow" -Object "`n`r - Modifying `"$STSFolder\web.config`"...`n`r"
        (Get-Content -Path "$STSFolder\web.config" -Encoding "UTF8") | Foreach-Object {
            $_ -replace 'connectionString="Application Name=\?\?\?;', "connectionString=`"Application Name=NBNSts;" `
           -replace ' Data source=\?\?\?;', " Data source=$SQLInstance;" `
           -replace 'Initial Catalog=\?\?\?;', "Initial Catalog=$DBName;" `
           -replace 'User Id=\?\?\?; ', "User Id=$DBUser; " `
           -replace 'Password=\?\?\?; ', "Password=$DBPassword; " `
           -replace '<HostApplicationUrl url="\?\?\?"></HostApplicationUrl>',"<HostApplicationUrl url=`"https://$VPPUrl/$HostAppname/`"></HostApplicationUrl>" `
           -replace '<add key="IssuerName" value="\?\?\?" />',"<add key=`"IssuerName`" value=`"PassiveSigningSTS`" />" `
           -replace '<add key="SigningCertificateName" value="\?\?\?" />', "<add key=`"SigningCertificateName`" value=`"$($cert.Subject)`" />" `
           -replace '<add key="CertificateThumbprint" value="\?\?\?" />', "<add key=`"CertificateThumbprint`" value=`"$($cert.Thumbprint)`" />"
        } | Set-Content -Path "$STSFolder\Web.config" -Encoding "UTF8"

        Write-Host -ForegroundColor "Green" -Object " - $STSAppName Web.config file successfully modified."

    } else {
        Write-Host -ForegroundColor "Green" -Object " - Application pool: $STSPool already exists."
    }

    Write-Host "`n`r"
}

$confirmation = Read-Host " Do you want to continue? (y/n)"
switch ($confirmation) `
    {
    'y' {
        install
    }

    'n' {
        Write-Host "`n`r"
        break
    }

    default {
        Write-Host "`n`r"
        break
    }
}