MqttRpcDevice 构造函数 (String, Int32, String)

public MqttRpcDevice(
	string ipAddress,
	int port,
	string topic = null
)

Public Sub New ( 
	ipAddress As String,
	port As Integer,
	Optional topic As String = Nothing
)

public:
MqttRpcDevice(
	String^ ipAddress, 
	int port, 
	String^ topic = nullptr
)

new : 
        ipAddress : string * 
        port : int * 
        ?topic : string 
(* Defaults:
        let _topic = defaultArg topic null
*)
-> MqttRpcDevice