public IAsyncResult BeginCreateTopic(string serviceNamespace, string issuerName, string issuerSecret, string name, AsyncCallback callback)
{
Requires.NotNullOrEmpty(serviceNamespace, "serviceNamespace");
Requires.NotNullOrEmpty(issuerName, "issuerName");
Requires.NotNullOrEmpty(issuerSecret, "issuerSecret");
Requires.NotNullOrEmpty(name, "name");
TokenProvider credentials = TokenProvider.CreateSharedSecretTokenProvider(serviceNamespace, issuerName, issuerSecret);
Func <TopicClient> creator = () => CreateTopic(credentials, name);
return(TopicClient.BeginCreateTopic(name, credentials, callback, creator));
}