Create a GUI lottery Game application - Help me

Question

1.  Create a GUI lottery game application. Generate three random numbers, each between 1 and 4. Allow the user to guess three numbers. Compare each of the user's guesses to the three random numbers and display a message that includes the user's guess, the randomly deter-mined three-digit number, and the amount of money the user has won as follows:
Matching Numbers                             Award ($)
Any one matching                                   10
Two matching                                          100
Three matching, not in order                1000
Three matching in exact order             10,000
No matches                                              0
Make certain that your application accommodates repeating digits. For example, if a user guesses 1, 2, and 3, and the randomly generated digits are 1, 1, and 1, do not give the user credit for three correct guesses—just one.
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Errors : i create this GUI lottery program it just read textbox1.text value and give me only first value 3 time in output.... need a help to fix it ?  File Attached for problem understanding.
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;


namespace LotteryGUI
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        private void button1_Click(object sender, EventArgs e)
        {


            // declaring integers


           int iNum1 = Convert.ToInt32(textBox1.Text);
           int iNum2 = Convert.ToInt32(textBox2.Text); 
           int iNum3 = Convert.ToInt32(textBox3.Text); 


            int iCount;
            int iGuess;


            // declaring constants


            const int iBALLS = 3;
            const int iMATCHONE = 10;
            const int iMATCHTWO = 100;
            const int iMATCHTHREE = 1000;
            const int iMATCHFOUR = 10000;




            // declaring arrays


            int[] iSortedNums = new int[3];
            int[] iGuesses = new int[3];
            int[] iSortedGuesses = new int[3];


            // generating random numbers


            Random randomnumber = new Random();


            iNum1 = randomnumber.Next(1, 5); //  gives number between 1 and 4
            iNum2 = randomnumber.Next(1, 5);
            iNum3 = randomnumber.Next(1, 5);
            iSortedNums[0] = iNum1;
            iSortedNums[1] = iNum2;
            iSortedNums[2] = iNum3;
            Array.Sort(iSortedNums); // sort random numbers


            for (iCount = 0; iCount < iBALLS; iCount++)
            {
               //textBox1.Text=("No:" + (iCount + 1) + " Choose your number: ");
                iGuess = Convert.ToInt32(textBox1.Text);


                while (iGuess < 1 || iGuess > 4)
                {
                    label6.Text = ("You have entered an incorrect number please try again");
                    textBox1.Text=("\nNo:" + (iCount + 1) + " Choose your number: ");
                    iGuess = Convert.ToInt32(Console.ReadLine());
                }


                iGuesses[iCount] = iGuess;
                iSortedGuesses[iCount] = iGuess;
            }


            Array.Sort(iSortedGuesses); // sort the guesses            


           
            label4.Text =String.Format ("The random numbers are    : " + iNum1 + ", " + iNum2 + ", " + iNum3);
            label5.Text = String.Format("The numbers you chose are : " + iGuesses[0] + ", " + iGuesses[1] + ", " + iGuesses[2]);
       


            if (iGuesses[0] == iNum1 && iGuesses[1] == iNum2 && iGuesses[2] == iNum3)
            {
                MessageBox.Show("you won $" + iMATCHFOUR);
            }


            else if (iSortedGuesses[0] == iSortedNums[0] && iSortedGuesses[1] == iSortedNums[1]
            && iSortedGuesses[2] == iSortedNums[2])
            {
                MessageBox.Show("you won $" + iMATCHTHREE);
            }


            else if ((iGuesses[0] == iNum1 && iGuesses[1] == iNum2) || (iGuesses[1] == iNum2 &&


iGuesses[2] == iNum3))
            {
                MessageBox.Show("you won $" + iMATCHTWO);
            }


            else if (iGuesses[0] == iNum1 || iGuesses[1] == iNum2 || iGuesses[2] == iNum3)
            {
                MessageBox.Show("you won $" + iMATCHONE);
            }


            else
            {
                MessageBox.Show("sorry, you didn't win anything");
            }


        }
    }
}