The security group that you can use as part of your inbound rules for your load balancer's back-end Amazon EC2 application instances. To
            only allow traffic from load balancers, add a security group rule to your back end instance that specifies this source security group as the
            inbound source.
             
            
 Declaration Syntax
 Declaration Syntax| C# | 
public SourceSecurityGroup SourceSecurityGroup { get; set; }