How to read Property Bags using CSOM

How to read Property Bags for a SharePoint Site Collection using CSOM

SharePoint/Administration/CSOM/PS_ReadAllPropertyBags_CSOM.ps1

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+############################################################################################################################################
+#Script that gets all the property Bags in a SharePoint Site Collection using Client Side Object Model 
+# Required Parameters:
+#  -> $sUserName: User Name to connect to the SharePoint Site Collection.
+#  -> $sPassword: Password for the user.
+#  -> $sSiteUrl: SharePoint Online Site Url
+############################################################################################################################################
+
+$host.Runspace.ThreadOptions = "ReuseThread"
+
+#Definition of the function that allows to read property bags in a SharePoint Site Collection
+function ReadSiteCollection-PropertyBags
+{
+    param ($sSiteColUrl,$sUserName,$sDomain,$sPassword)
+    try
+    {    
+        #Adding the Client OM Assemblies        
+        Add-Type -Path "<CSOM_Path>\Microsoft.SharePoint.Client.dll"
+        Add-Type -Path "<CSOM_Path>Microsoft.SharePoint.Client.Runtime.dll"
+
+        #SPO Client Object Model Context
+        $spCtx = New-Object Microsoft.SharePoint.Client.ClientContext($sSiteColUrl) 
+        $spCredentials = New-Object System.Net.NetworkCredential($sUserName,$sPassword,$sDomain)  
+        $spCtx.Credentials = $spCredentials      
+
+        Write-Host "----------------------------------------------------------------------------"  -foregroundcolor Green
+        Write-Host "Reading PropertyBags values for $sSiteColUrl !!" -ForegroundColor Green
+        Write-Host "----------------------------------------------------------------------------"  -foregroundcolor Green
+
+        $spSiteCollection=$spCtx.Site
+        $spCtx.Load($spSiteCollection)
+        $spRootWeb=$spSiteCollection.RootWeb
+        $spCtx.Load($spRootWeb)        
+        $spAllSiteProperties=$spRootWeb.AllProperties
+        $spCtx.Load($spAllSiteProperties)
+        $spCtx.ExecuteQuery()                
+        $spPropertyBagKeys=$spAllSiteProperties.FieldValues.Keys
+        #$spoPropertyBagKeys
+        foreach($spPropertyBagKey in $spPropertyBagKeys){
+            Write-Host "PropertyBag Key: " $spPropertyBagKey " - PropertyBag Value: " $spAllSiteProperties[$spPropertyBagKey] -ForegroundColor Green
+        }        
+        $spCtx.Dispose()
+    }
+    catch [System.Exception]
+    {
+        write-host -f red $_.Exception.ToString()   
+    }    
+}
+
+#Required Parameters
+$sSiteColUrl = "http://<SiteCollectionUrl>" 
+$sUserName = "<UserName>" 
+$sDomain="<AD_Domain>"
+$sPassword =""<AD_Domain>"
+
+ReadSiteCollection-PropertyBags -sSiteColUrl $sSiteColUrl -sUserName $sUserName -sDomain $sDomain -sPassword $sPassword
+
+
+