public void Unsubscribe_10000_Topics()
{
foreach (var topic in _topics)
{
var unsubscribeOptions = new MqttClientUnsubscribeOptionsBuilder()
.WithTopicFilter(topic)
.Build();
_mqttClient.UnsubscribeAsync(unsubscribeOptions).GetAwaiter().GetResult();
}
}
public static Task <MqttClientUnsubscribeResult> UnsubscribeAsync(this MqttClient mqttClient, string topic, CancellationToken cancellationToken = default)
{
if (mqttClient == null)
{
throw new ArgumentNullException(nameof(mqttClient));
}
if (topic == null)
{
throw new ArgumentNullException(nameof(topic));
}
var unsubscribeOptions = new MqttClientUnsubscribeOptionsBuilder().WithTopicFilter(topic)
.Build();
return(mqttClient.UnsubscribeAsync(unsubscribeOptions, cancellationToken));
}