private void button2_Click(object sender, EventArgs e)
 {
     this.Hide();
     Home a = new Home();
     a.Show();
 }
 private void button1_Click(object sender, EventArgs e)
 {
     this.Hide();
     Home frm = new Home();
     frm.Show();
 }
 private void registrationToolStripMenuItem_Click(object sender, EventArgs e)
 {
     this.Hide();
     Home a = new Home();
     a.Show();
 }