## Gather orphaned resources details using below link and use below script to delete all orphaned resources
https://github.com/scautomation/AzureResourceGraph-Examples/blob/master/resourceQueries/Orphaned%20Resources/OrphanedResource.MD

##########################DeleteOrphanedDisk##########################
$csv = Import-Csv "disk.csv" #name of csv file 

$filetim = (Get-Date).tostring("dd-MM-yyyy-hh-mm")
$Logfile = "log-deletedisk-$filetim.log"

Function LogWrite
{
   Param ([string]$logstring)

 

   Add-content $Logfile -value $logstring
}
Start-Transcript -Path $Logfile
Stop-Transcript

LogWrite " "
LogWrite " "
LogWrite "***** LogFile *****"
LogWrite " "
LogWrite " "

$csv | ForEach-Object {

$diskname = $_.NAME
$state = $_.DISKSTATE
$resourcegroup = $_.RESOURCEGROUP
$location = $_.LOCATION

if($state -like "Unattached")
{

$tim = (Get-Date).tostring("dd-MM-yyyy-hh:mm:ss")
LogWrite "$tim    -    Deleting disk $diskname in $resourcegroup of Location - $location"
Write-Host -ForegroundColor Cyan "Deleting Disk $diskname in $resourcegroup of Location - $location"
Remove-AzDisk -ResourceGroupName $resourcegroup -DiskName $diskname -Force
}
else
{
Write-Host -ForegroundColor Red "Failed to delete the disk $diskname in $resourcegroup of Location - $location since it is Attached" 
$tim = (Get-Date).tostring("dd-MM-yyyy-hh:mm:ss")
LogWrite "$tim    -   Failed to delete the disk $diskname in $resourcegroup of Location - $location since it is Attached"

}
}
#####################################################################
##########################DeleteOrphanedNICs##########################
$csv = Import-Csv "nic.csv" #name of csv file 

$filetim = (Get-Date).tostring("dd-MM-yyyy-hh-mm")
$Logfile = "log-$filetim.log"

Function LogWrite
{
   Param ([string]$logstring)

 

   Add-content $Logfile -value $logstring
}

Start-Transcript -Path $Logfile
Stop-Transcript

LogWrite " "
LogWrite " "
LogWrite "***** LogFile *****"
LogWrite " "
LogWrite " "

$csv | ForEach-Object {

$nicname = $_.NAME
$resourcegroup = $_.RESOURCEGROUP
$location = $_.LOCATION

$tim = (Get-Date).tostring("dd-MM-yyyy-hh:mm:ss")
LogWrite "$tim    -    Deleting NIC $nicname in $resourcegroup of Location - $location"
Write-Host -ForegroundColor Cyan "Deleting NIC $nicname in $resourcegroup of Location - $location"

Remove-AzNetworkInterface -Name $nicname -ResourceGroup $resourcegroup -Force

}
#####################################################################
##########################DeleteOrphanedNSGs#########################
$csv = Import-Csv "nsg.csv" #name of csv file 

$filetim = (Get-Date).tostring("dd-MM-yyyy-hh-mm")
$Logfile = "log-deleteNSG-$filetim.log"

Function LogWrite
{
   Param ([string]$logstring)

   Add-content $Logfile -value $logstring
}

Start-Transcript -Path $Logfile
Stop-Transcript

LogWrite " "
LogWrite " "
LogWrite "***** LogFile *****"
LogWrite " "
LogWrite " "

$csv | ForEach-Object {

$nsgname = $_.RESOURCE
$resourcegroup = $_.RESOURCEGROUP
$location = $_.LOCATION

$tim = (Get-Date).tostring("dd-MM-yyyy-hh:mm:ss")
LogWrite "$tim    -    Deleting NSG $nsgname in $resourcegroup of Location - $location"
Write-Host -ForegroundColor Cyan "Deleting NSG $nsgname in $resourcegroup of Location - $location"

Remove-AzNetworkSecurityGroup -Name $nsgname -ResourceGroup $resourcegroup -Force

}
#####################################################################
##########################DeleteOrphanedPiP##########################
$csv = Import-Csv "pip.csv" #name of csv file 

$filetim = (Get-Date).tostring("dd-MM-yyyy-hh-mm")
$Logfile = "log-deletePIP-$filetim.log"

Function LogWrite
{
   Param ([string]$logstring)

   Add-content $Logfile -value $logstring
}

Start-Transcript -Path $Logfile
Stop-Transcript

LogWrite " "
LogWrite " "
LogWrite "***** LogFile *****"
LogWrite " "
LogWrite " "

$csv | ForEach-Object {

$pipname = $_.NAME
$resourcegroup = $_.RESOURCEGROUP
$location = $_.LOCATION

$tim = (Get-Date).tostring("dd-MM-yyyy-hh:mm:ss")
LogWrite "$tim    -    Deleting Public IP $pipname in $resourcegroup of Location - $location"
Write-Host -ForegroundColor Cyan "Deleting Public IP $pipname in $resourcegroup of Location - $location"

Remove-AzPublicIpAddress -Name $pipname -ResourceGroupName $resourcegroup -Force

}
#####################################################################