Gets and sets the property Id. A unique identifier for the origin. The value of Id
            must be unique within    the distribution.    You use the value of Id when you create
            a cache behavior. The Id    identifies the origin that CloudFront routes a request
            to when the request    matches the path pattern for that cache behavior.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public string Id { get; set; }