C# Q2 is not working correctly please help

it should when selected one of the item from listbox the output label down should change answer

the part is needed help in bold text

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace Alshafie_sp2017

{

public partial class mySecondForm : Form

{

public mySecondForm()

{

InitializeComponent();

}

private void Q1()

{

int count = 0;

for (count = 0; count

{

SecondLst.Items.Add("Walla Alshafie ");

}

}

private void q1_Btn_Click(object sender, EventArgs e)

{

Q1();

}

private void LoadList()

{

//load the cities that the users going to choice

SecondLst.Items.Add("Honolulu");

SecondLst.Items.Add("New York");

SecondLst.Items.Add("Denver");

}

private void q2_Btn_Click(object sender, EventArgs e)

{

Q2();

LoadList();

}

private void Q2()

{

string choice = SecondLst.SelectedItems.ToString();

switch (choice)

{

case "Honolulu":

secondOutputLbl.Text = "Hawali";

break;

case "New York":

secondOutputLbl.Text = "New York";

break;

case "Denver":

secondOutputLbl.Text = "Denver";

break;

default:

secondOutputLbl.Text = "this is the default city";

break;

}

}

private void Q3()

{

double result;

result = Math.Pow(12.0, 2.0);

secondOutputLbl.Text = result.ToString("n2");

}

private void q3_Btn_Click(object sender, EventArgs e)

{

Q3();

}

private void Q4()

{

decimal pricePerFoot = 2.99m;

double boardLength = 10.5;

decimal totalCost;

totalCost = (decimal)boardLength * pricePerFoot;

}

private void q4_Btn_Click(object sender, EventArgs e)

{

Q4();

}

private void Q5()

{

int[] scores = { 70, 55, 100, 93 };

int total = 0;

for(total=0;total

{

secondOutputLbl.Text = total.ToString("n2");

}

}

private void q5_Btn_Click(object sender, EventArgs e)

{

Q5();

}

private int Square(int value)

{

return value * value;

}

private void q6_Btn_Click(object sender, EventArgs e)

{

int result;

result = Square(10);

secondOutputLbl.Text = result.ToString();

}

private void exitBtn_Click(object sender, EventArgs e)

{

this.Close();

}

}

}

Questions Q1 Honolulu New York Denver Q4 Q2 Q5 003 Q6 Exit