Specifies the type of load balancer. If the Scheme is internet-facing, the load balancer has a publicly resolvable DNS name
that resolves to public IP addresses. If the Scheme is internal, the load balancer has a publicly resolvable DNS name that
resolves to private IP addresses. This option is only available for load balancers attached to an Amazon VPC.
Declaration Syntax| C# |
public string Scheme { get; set; }