Added ReturnAllPages sample in readme

Author: DigitalFlow

README.md

@@ -79,7 +79,12 @@ WebApiClient.Retrieve(request)
 
 #### Retrieve multiple records
 Retrieve of multiple records uses paging. Per default you can set a [page size on your requests] (#page-size), however this is limited to 5000 records.
-If you want to really retrieve all records, set WebApiClient.ReturnAllPages to true, as it is by default false.
+If you want to really retrieve all records, set WebApiClient.ReturnAllPages to true, as it is by default false, like this:
+
+``` JavaScript
+WebApiClient.ReturnAllPages = true;
+```
+
 By setting this to true, each retrieve multiple request will check for an @odata.nextLink property inside the response, call the next page and concatenate the results, until all records have been retrieved.
 
 Retrieve by query expression: