private void btnback_Click(object sender, EventArgs e)
{
additionlevel4 frm2 = new additionlevel4(this.txtusername.Text);
frm2.ShowDialog();
this.Hide();
}
private void btnnext_Click_1(object sender, EventArgs e)
{
additionlevel4 ad4 = new additionlevel4(this.txtusername.Text);
ad4.ShowDialog();
this.Hide();
}