WinForm jump to the second form case

Forms 1 Form class

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 WinFormsApp1728
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //  Instantiation of the second form class .
            Form2 objfor=new Form2();

            objfor.Show();
            //objfor.ShowDialog();


            //MessageBox.Show(" Button click event triggers , Output string mode 1");
        }
    }
}

  Main function entry add

  

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WinFormsApp1728
{
    internal static class Program
    {
        /// <summary>
        ///  The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.SetHighDpiMode(HighDpiMode.SystemAware);
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
            Application.Run(new Form2());//  Definition of the second form .



        }
    }
}

effect