Gets and sets the property OriginAccessIdentity. The CloudFront origin access identity
            to associate with the origin. Use    an origin access identity to configure the origin
            so that end users can    only access objects in an Amazon S3 bucket through CloudFront.
               If you want end users to be able to access objects using either the    CloudFront
            URL or the Amazon S3 URL, specify an empty    OriginAccessIdentity element.    To
            delete the origin access identity from an existing distribution, update    the distribution
            configuration and include an empty    OriginAccessIdentity element.    To replace
            the origin access identity, update the distribution configuration    and specify the
            new origin access identity.    Use the format origin-access-identity/cloudfront/Id
            where Id is the value that     CloudFront returned in the Id element when you created
            the origin access identity.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public string OriginAccessIdentity { get; set; }