public Task UnsubscribeAsync(IEnumerable <string> topics, CancellationToken cancellationToken)
{
var builder = new MqttClientUnsubscribeOptionsBuilder();
foreach (string topic in topics)
{
builder.WithTopicFilter(topic);
}
return(client.UnsubscribeAsync(builder.Build(), cancellationToken));
}
public async Task UnsubscribeAsync(string topic)
{
if (!IsSubscribed(topic))
{
return;
}
var options = new MqttClientUnsubscribeOptions();
options.TopicFilters = new List <string> {
topic
};
await client.UnsubscribeAsync(options);
mqttState.RemoveSubscription(s => s.Topic == topic);
}