private static void AddEndpoint_(String endpointName, String regionId, String product, String domain)
{
ISet<String> regions = new HashSet<String>();
regions.Add(regionId);
List<ProductDomain> productDomains = new List<ProductDomain>();
productDomains.Add(new ProductDomain(product, domain));
Endpoint endpoint = new Endpoint(endpointName, regions, productDomains);
endpoints.Add(endpoint);
}