Function Get-IISAppPoolChildApplicationsCount {
<#
.SYNOPSIS
    Returns a count of the attached applications (including any root sites) in use by an application pool in IIS.

.PARAMETER $AppPoolName
    [string] The name of the application pool in question
#>
    [CmdletBinding()]
    Param(
        [Parameter(Mandatory = $true, Position = 0)]
        [string]$AppPoolName
    )
    process {
        ## Based off this information https://stackoverflow.com/a/20751426/109749
        return @(Get-WebConfigurationProperty "/system.applicationHost/sites/site/application[@applicationPool=`'$appPoolName`']" "machine/webroot/apphost" -name path).Count
    }
}