Form4.cs

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 Liberary_management_system
{
    public partial class Form4 : Form
    {
        public Form4()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Hide();
            delete del = new delete();
            del.Show();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.Hide();
            Form5 f5 = new Form5();
            f5.Show();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            this.Hide();
            Form7 f7 = new Form7();
            f7.Show();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            this.Hide();
            Form8 f8 = new Form8();
            f8.Show();
        }

        private void button6_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void button5_Click(object sender, EventArgs e)
        {
            this.Hide();
            Form1 f1 = new Form1();
            f1.Show();
        }

        private void button7_Click(object sender, EventArgs e)
        {
            this.Hide();
            Form9 f9 = new Form9();
            f9.Show();
        }

        private void button8_Click(object sender, EventArgs e)
        {
            this.Hide();
            view v = new view();
            v.Show();
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void printToolStripMenuItem_Click(object sender, EventArgs e)
        {
            MessageBox.Show("Printer is not connected");
        }

        private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Hide();
            Form4 f4 = new Form4();
            f4.Show();
        }

        private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            MessageBox.Show("Copyright 2019 all rights reserved \n Muhammad Tayyab \n And \n Najam Shehzad");
        }

        private void searchToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Hide();
            Form7 f6 = new Form7();
            f6.Show();
        }
    }
}