private void button2_Click(object sender, EventArgs e)
        {
            Managedepartment d = new Managedepartment();

            d.Show();
            this.Hide();
        }
        private void button14_Click(object sender, EventArgs e)
        {
            if (textBox1.Text != "" && textBox2.Text != "")
            {
                d1.insert(textBox1.Text, textBox2.Text);
                MessageBox.Show("Data Inserted");
            }

            else
            {
                MessageBox.Show("Error! Please Insert Complete Data");
            }

            Managedepartment d = new Managedepartment();

            d.Show();
            this.Hide();
        }