/// <summary>
 /// Lists all subnets associated with the account.
 /// </summary>
 /// <returns>
 /// A collection of subnet resources associated with the account.
 /// </returns>
 public static IEnumerable <Subnet> ListSubnets(this NetworkingService networkingService)
 {
     return(networkingService.ListSubnetsAsync().ForceSynchronous());
 }