private void button3_Click(object sender, EventArgs e)
        {
            Home_renter_view hrv = new Home_renter_view();

            hrv.Show();
            this.Hide();
        }
        private void b_login_Click(object sender, EventArgs e)
        {
            string s   = textBox1.Text;
            string s2  = textBox2.Text;
            var    str = from a2 in ul.UserLists
                         where a2.UserId == s && a2.Password == s2

                         select a2;
            UserList pa = str.First();

            s2 = pa.Password.ToString();
            string s3 = pa.UserType.ToString();


            try
            {
                if (s.Equals(textBox1.Text) && s2.Equals(textBox2.Text) && s3.Equals("Admin"))
                {
                    Admin_Form af = new Admin_Form();
                    af.Show();
                    this.Hide();
                }

                else if (s.Equals(textBox1.Text) && s2.Equals(textBox2.Text) && s3.Equals("Landowner"))
                {
                    Landowner_View lv = new Landowner_View();
                    lv.Show();
                    this.Hide();
                }

                else if (s.Equals(textBox1.Text) && s2.Equals(textBox2.Text) && s3.Equals("Home Renter"))
                {
                    Home_renter_view hrv = new Home_renter_view();
                    hrv.Show();
                    this.Hide();
                }
            }
            catch (Exception)
            {
                if (textBox1.Text == "" || textBox2.Text == "")
                {
                    MessageBox.Show("Please enter a valid input");
                }
            }
        }