public IAsyncResult BeginCreateSubscription(ITopicClient topic, string name, string sqlFilter, AsyncCallback callback)
{
Requires.NotNull(topic, "topic");
Requires.NotNullOrEmpty(name, "name");
TopicClient client = (TopicClient)topic;
SqlFilter filter = new SqlFilter(sqlFilter);
SubscriptionDescription description = new SubscriptionDescription();
// TODO: Filters aren't actually working at the moment
//description.DefaultRuleDescription = new RuleDescription(filter);
description.DefaultRuleDescription = new RuleDescription();
Func <SubscriptionClient> creator = () => CreateSubscription(client, name);
return(SubscriptionClient.BeginCreateSubscription(client.Path, name, description, client.TokenProvider, callback, creator));
}