Beginning form problems

A created a new method startGame which will be called in the constructor class and in the PlayAgain event.

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 RockPaperScissors
{
    public partial class rockPaperScissors : Form
    {
        public rockPaperScissors()
        {
            InitializeComponent();
            startGame();
        }//End Rock Paper Scissors


        private void startGame()
        {
            int compChoice;
            Random randomNumber = new Random();

            compChoice = randomNumber.Next(0, 3);

            switch (compChoice)
            {
                case 0:

                    pbCompChoice.Image = Properties.Resources.rock;

                    break;

                case 1:

                    pbCompChoice.Image = Properties.Resources.sillouttepaper;

                    break;
                case 2:

                    pbCompChoice.Image = Properties.Resources.scirrorssilloutte;

                    break;

            }


        }




        private void pbRock_Click(object sender, EventArgs e)
        {
            pbYourChoice.Image = Properties.Resources.rock;
            PlayGame();
            pbCompChoice.Visible = true;
        }

        private void pbPaper_Click(object sender, EventArgs e)
        {
            pbYourChoice.Image = Properties.Resources.sillouttepaper;
            PlayGame();
            pbCompChoice.Visible = true;
        }

        private void pbScissors_Click(object sender, EventArgs e)
        {
            pbYourChoice.Image = Properties.Resources.scirrorssilloutte;
            PlayGame();
            pbCompChoice.Visible = true;
        }//End pbRock Click

        public void PlayGame()
        {
            if ((pbYourChoice == pbPaper && pbCompChoice == pbRock) || (pbYourChoice == pbRock && pbCompChoice == pbScissors) || (pbYourChoice == pbScissors && pbCompChoice == pbPaper))
            {
                lblWin.Visible = true;
            }

            else if ((pbYourChoice == pbScissors && pbCompChoice == pbPaper) || (pbYourChoice == pbPaper && pbCompChoice == pbScissors) || (pbYourChoice == pbRock && pbCompChoice == pbPaper))
            {
                lblLose.Visible = true;
            }

            else
            {
                lblPush.Visible = true;
            }

            bttnPlayAgain.Visible = true;
        }

        private void bttnPlayAgain_Click(object sender, EventArgs e)
        {
            //pbYourChoice.Visible = false;
            //pbCompChoice.Visible = false;
            //new Random();

            bttnPlayAgain.Visible = false;
            startGame();
        }
    }

}

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jdweng