function Get-MachineConfigAppSetting {
<#
.SYNOPSIS
	Returns an app setting value from the machine config
#>
    param (
        [Parameter(Position = 0, Mandatory = $true)]
        [Alias("Key")]
        [string]$appSettingKey
    )

    Write-Warning "This function to be deprecated in favor of Get-AppSetting"
    try {
        Write-Host "##teamcity[message text='Found usage of Get-MachineConfigAppSetting. This should be switched to Get-AppSetting. Please address in $(Get-ParentExecutionName)' status='WARNING']"
    } catch {
        ## In case the Get-ParentExecutionName call blows up. It shouldn't.
        ## But I'm calling this to deprecate the usage of this function, so I don't want this to break that ... yet
        Write-Host "##teamcity[message text='Found usage of Get-MachineConfigAppSetting. This should be switched to Get-AppSetting. Please address in the parent call.' status='WARNING']"
    }

    $logLead  = (Get-LogLeadName);

    Write-Verbose ("$logLead : Reading machine.config")
    $machineConfig = Read-MachineConfig

    if ($null -eq $machineConfig) {
        Write-Warning ("$logLead : The machine.config file could not be read")
        return $null
    }

    $appSettingsNode = $machineConfig.Configuration.appSettings

    if ($null -eq $appSettingsNode) {
        Write-Warning ("$logLead : The app settings section could not be found")
        return $null
    }

    Write-Verbose ("$logLead : Looking for AppSetting with Key {0}" -f $appSettingKey)
    $appSetting = $appSettingsNode.SelectNodes("//add[@key='$appSettingKey']")

    if (($null -eq $appSetting) -or ($appSetting.Count -eq 0)) {
        Write-Warning ("$logLead : The AppSetting with Key {0} could not be found" -f $appSettingKey)
        return $null
    }

    return $appSetting
}