A unique name for the deployment environment. Used in the application URL.
            Constraint: Must be from 4 to 23 characters         in length. The name can      
              contain only letters, numbers, and hyphens. It cannot start         or end with
                    a hyphen. This name must be unique in your account.         If the specified
                    name already exists, AWS Elastic Beanstalk         returns an          CopyC#
CopyC#InvalidParameterValue
Default: If the CNAME parameter is not specified, the environment name becomes part of the CNAME, and therefore part of the visible URL for your application.
 Declaration Syntax
 Declaration Syntax| C# | 
public string EnvironmentName { get; set; }