How to pass the local variable in a method to the other class?

Question

 I am pretty new to c# would somebody help me on this

 

 How to pass the local variable in a method to the other class or a method?

using an event or a delegate, 

 

 

 

using Newtonsoft.Json;

using System;

using System.Collections.Generic;

using System.Net;

using System.Runtime.CompilerServices;

using System.Runtime.InteropServices;

using System.Security.Cryptography.X509Certificates;

using System.Threading;

using System.Threading.Tasks;

using Timer = System.Timers.Timer;

namespace APPTest

{

public delegate MeterData meterdata();

public class Entry : Substation

{

public static event meterdata meterEvent;

private static Timer _timer;

static void SetTimer()

{

_timer = new Timer(1000);

_timer.Elapsed += _timer_Elapsed;

_timer.AutoReset = true;

_timer.Enabled = true;

}

private static void _timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)

{

}

public void EnterData()

{

Raspberry_Connection();

SetTimer();

}

public void Raspberry_Connection() //

{

// var substation = new Substation() { IPAddress = "172.16.1.90", Topic = "raspberry_main", ConnectionStatus = true };

IPAddress = "172.16.1.90";

Topic = new[] { "raspberry_main", "raspberry_weather" };

Connected = true;

Mqttconnection();

MqttEvents += Substation_MqttEvents;

}

public void Substation_MqttEvents(object sender, uPLibrary.Networking.M2Mqtt.Messages.MqttMsgPublishEventArgs e)

{

var Topic_Message = System.Text.Encoding.UTF8.GetString(e.Message);

var Topic_DeserializeMessage = JsonConvert.DeserializeObject<MeterData>(Topic_Message);

try

{

// Console.WriteLine(Current_A);

// Console.WriteLine(tags.LastMonthPeak_TotalDemand_23AH);

//Console.WriteLine("23AH Real Power : {0}", Topic_DeserializeMessage.Tags.Real_Power_23_AH);

//Console.WriteLine("Weather cloud details :{0}", Topic_DeserializeMessage.detail);

//Console.WriteLine("Weather ID : {0}", Topic_DeserializeMessage.id);

//Console.WriteLine("Weather cloud weather :{0}", Topic_DeserializeMessage.weather);

}

catch (NullReferenceException ex)

{

}

}

}

}