I could really use some help finishing this question I the code must be a GUI an

Question

I could really use some help finishing this question

I the code must be a GUI and I can only figure out how to do it as a console application

The code must be in C# and must be a basic as possible because I am a beginner

I have a maximum value entered to show highest number out of the 10 when sorted, I don't know how I should properly set it up to show the second number that is largest out of the set.

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Use GUI for input and output.
(Find the Two Largest Number) The process of finding the maximum value (i.e., the largest of a group of values) is used frequently in computer applications.
For example, an app that determines the winner of a sales contest would input the number of units sold by each salesperson. The salesperson who sells the most units wins the contest.
Suggestion: first Write pseudocode, then a C# app that takes a user inputs: a series of 10 integers, then determines and displays the largest integer. <
Your app should use at least the following three variables: a) counter: A counter to count to 10 (i.e., to keep track of how many numbers have been input and to determine when all 10 numbers have been processed). b) number: The integer most recently input by the user. c) largest: The largest number found so far d) find the second largest value - for a full credit! e) [Note: You may input each number only once.]

Here is my code below

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 A1_E2
{
    public partial class LargestNumbers : Form
    {
        private object ex;

        private void btnCalculate_Click(object sender, EventArgs e)
        {
            int max = Int32.MaxValue;
            int min = Int32.MinValue;

            try
            {
                List<TextBox> Iboxes = GetTextBoxes();
                foreach (TextBox tBox in Iboxes)
                {
                    if (false == string.IsNullOrEmpty(tBox.Text))
                    {
                        int iBoxVal = Convert.ToInt32(tBox.Text);

                        if (iBoxVal > max)
                        {
                            max = iBoxVal;
                        }

                    }

                    if (max != Int32.MaxValue)
                    {
                        txtLargeNum.Text = max.ToString();
                    }
                    else
                    {
                        MessageBox.Show("Please enter a valid number.");
                    }
                }
           
            }
            catch (FormatException fx)
            {
                Console.WriteLine("btnCalculate_Click()Format Exception Handled:" + fx);
                MessageBox.Show("Please enter only numbers.");
            }
            catch(Exception ex)
            {
                Console.WriteLine("btnCalculate_Click()Exception Handled:" + ex);
                MessageBox.Show(ex.Message);
            }
        }
        private List<TextBox> GetTextBoxes()
        {
            List<TextBox> list = new List<TextBox>();
            try
            {
                foreach (Control ctrl in this.Controls)
                {
                    if(ctrl is TextBox)
                    {
                        list.Add((TextBox)ctrl);
                    }
                }
            }
            catch(Exception ex)
            {
                Console.WriteLine("GetTextBoxes() Exception Handled:" + ex);

            }
            return list;
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

Naming of text boxes

Explanation / Answer

At the end of btnCalculate_click() call this function:

void FindSecondLargestNumber()
{
try
{
List<int> sortedList = new List<int>();
sortedList.Add(Convert.ToInt32(textBox1.Text));
sortedList.Add(Convert.ToInt32(textBox2.Text));
sortedList.Add(Convert.ToInt32(textBox3.Text));
sortedList.Add(Convert.ToInt32(textBox4.Text));
sortedList.Add(Convert.ToInt32(textBox5.Text));
sortedList.Add(Convert.ToInt32(textBox6.Text));
sortedList.Add(Convert.ToInt32(textBox7.Text));
sortedList.Add(Convert.ToInt32(textBox8.Text));
sortedList.Add(Convert.ToInt32(textBox9.Text));
sortedList.Add(Convert.ToInt32(textBox10.Text));
sortedList.Sort();
foreach (int item in sortedList)
{
if (item != Convert.ToInt32(txtLargeNum.Text))
{
//Use the name of your textbox to store second largest number here instead of txtSecondLargeNum
txtSecondLargeNum.Text = item;
}
}
}
catch(Exception ex)
{

}
}

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