Remove empty Resource Groups in Azure

Q. How can I remove all empty Resource Groups in an Azure subscription?

A. You may create resources and a Resource Group is automatically created which are left behind if you delete the resource. Below is some easy PowerShell to delete any Resource Group that is empty. It displays each Resource Group and the number of resources within.

Switch-AzureMode -Name AzureResourceManager$RGs = Get-AzureResourceGroupforeach($RG in $RGs){    $Resources = Get-AzureResource -ResourceGroupName $RG.ResourceGroupName -OutputObjectFormat New    $outputstr = $RG.ResourceGroupName + " - " + $Resources.Length    Write-Output $outputstr    if($Resources.Length -eq 0)    {        Remove-AzureResourceGroup -Name $RG.ResourceGroupName    }}