Dom

I have the same problem. > What's the problem with using a `MqttTopicFilterBuilder`? The "problem" is, that this is from the [sample code](https://github.com/dotnet/MQTTnet/blob/e18a91a4b59bc312aa9acf9be575401d07b793e4/Samples/Client/Client_Subscribe_Samples.cs#L47C52-L47C81) from the current master branch, so the...