The ID of the Amazon EC2 instance you want to use to create the Auto Scaling group. Use this attribute if you want to create an Auto Scaling
            group using an EC2 instance instead of a launch configuration. When you use an instance to create an Auto Scaling group, a new launch
            configuration is first created and then associated with the Auto Scaling group. The new launch configuration derives all its attributes from
            the instance that is used to create the Auto Scaling group, with the exception of BlockDeviceMapping. For more information, see Create an Auto Scaling Group Using EC2
            Instance in the Auto Scaling Developer Guide.
             
            
Constraints:
 Declaration Syntax
 Declaration Syntax| C# | 
public string InstanceId { get; set; }