Gets and sets the property DomainName. Amazon S3 origins: The DNS name of the Amazon
            S3 bucket from    which you want CloudFront to get objects for this origin, for example,
               myawsbucket.s3.amazonaws.com.    Custom origins: The DNS domain name for the HTTP
            server from which    you want CloudFront to get objects for this origin, for example,
               www.example.com.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public string DomainName { get; set; }