'WebClient.WebClient()' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.' (https://aka.ms/dotnet-warnings/SYSLIB0014)

The variable 'setupBlock' is assigned but its value is never used

'AppDomain.Unload(AppDomain)' is obsolete: 'Creating and unloading AppDomains is not supported and throws an exception.' (https://aka.ms/dotnet-warnings/SYSLIB0024)

The variable 'e' is declared but never used

'MqttClientOptionsBuilder.WithWebSocketServer(string, MqttClientOptionsBuilderWebSocketParameters)' is obsolete: 'Use WithWebSocketServer(... configure) instead.'

'MqttClientOptionsBuilderTlsParameters' is obsolete: 'Use methods from MqttClientOptionsBuilder instead.'

'MqttClientOptionsBuilder.WithTls(MqttClientOptionsBuilderTlsParameters)' is obsolete: 'Use WithTlsOptions(... configure) instead.'

'WebClient.WebClient()' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.' (https://aka.ms/dotnet-warnings/SYSLIB0014)

The variable 'e' is declared but never used