Read -ExpandProperty keys with case-insensitive - powershell

Question

My following script is successfully working. But it is not reading the Tags fields with case-insensitive.
$resources = Get-AzureRmResource | Where-Object {($_.ResourceType -eq "Microsoft.Compute/virtualMachines") -or ($_.ResourceType -eq "Microsoft.Sql/servers/databases")} |
 foreach {
   new-object -TypeName psobject -Property #{
                                    ResourceName       =       $_.ResourceName;
                                    ResourceType       =       $_.ResourceType;
                                    OperatingHours  =  
                                                        if ( ($_ | select -expand Tags).OperatingHours -ieq $null )
                                                        {"TAG NOT PRESENT"}
                                                        elseif ( ($_ | select -expand Tags).OperatingHours -ieq '')
                                                        {"NULL/EMPTY"}
                                                        else
                                                        {($_ | select -expand Tags).OperatingHours} ;
                                             }
          }
$resources | Format-Table
The Output of above script is:
ResourceType                       ResourceName       OperatingHours            
------------------------            --------------     ------------------            
Microsoft.Compute/virtualMachines   asa-perfvm16       TAG NOT PRESENT
Microsoft.Compute/virtualMachines   OAASLogicApps1    TAG NOT PRESENT
Microsoft.Compute/virtualMachines   VMForPerfTest      TAG NOT PRESENT
Here, some resources do not have 'OperatingHours', rather they have 'operatinghours' or 'Operatinghours' or any other case-combination. This value is set by users, so it can be of any case-combination.
My above script is not fetching proper data in relation to case-insensitiveness of Tags.Key. I am not concerned with the case of Tags.Value.
I tried to modify the above script with following but still the output is same. The three resource-list that is appearing in output; all resources are created by me so I am sure that concerned Tag is present in all of them but with different cases.
Modified Script (but no success):
$resources = Get-AzureRmResource | Where-Object {($_.ResourceType -eq "Microsoft.Compute/virtualMachines") -or ($_.ResourceType -eq "Microsoft.Sql/servers/databases")} |
 foreach {
         
        $rTags = #{}
            foreach($key in $resources.Tags.key)
            {
                      $rTags.Add($key.ToLower(), $resources.Tags[$key].ToLower())
            }
   new-object -TypeName psobject -Property #{
ResourceName       =       $_.ResourceName;
ResourceType       =       $_.ResourceType;
             OperatingHours =  
              if ( $rTags.OperatingHours -ieq $null )
                  {"TAG NOT PRESENT"}
              elseif ( $rTags.OperatingHours -ieq '')
                  {"NULL/EMPTY"}
              else
                  {$rTags.OperatingHours} ;
                                             }
          }
$resources | Format-Table
Where am I going wrong here?

Answer 1

I knew it had to be a very small change. Following is the updated script that is helping me fetch required output.
$resources = Get-AzureRmResource | Where-Object {($_.ResourceType -eq "Microsoft.Compute/virtualMachines") -or ($_.ResourceType -eq "Microsoft.Sql/servers/databases")} |
foreach {
        [hashtable] $rTags = #{}
            foreach($key in $_.Tags.keys)
            {
                      $rTags.Add($key.ToLower(), $_.Tags[$key].ToLower())
            }
new-object -TypeName psobject -Property #{
ResourceName = $_.ResourceName;
ResourceType = $_.ResourceType;
operatinghours =
if ( ! $rTags.ContainsKey("operatinghours") )
{"TAG NOT PRESENT"}
elseif ( $rTags.operatinghours -ieq '' -or $rTags.operatinghours -ieq $null)
{"NULL/EMPTY"}
else
{ $rTags.operatinghours } ;
env =
if ( ! $rTags.ContainsKey("env") )
{"TAG NOT PRESENT"}
elseif ( $rTags.env -ieq '' -or $rTags.env -ieq $null)
{"NULL/EMPTY"}
else
{ $rTags.env } ;
}
}
$resources | Format-Table
What changes I did ?
Use of Hastable
Using $_ rather than $resources (yeah... a very sill mistake :P)