private void goToMainToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Hide();
            firstForm o = new firstForm();

            o.ShowDialog();
        }
 private void loginbutton_Click(object sender, EventArgs e)
 {
     if (authenticated(usernametextBox.Text, passwordtextBox.Text))
     {
         MessageBox.Show("Welcome \t " + usernametextBox.Text + " \t you are Successfully login", "Login", MessageBoxButtons.OK, MessageBoxIcon.Information);
         this.Hide();
         firstForm o = new firstForm();
         o.ShowDialog();
         saaf();
     }
     else
     {
         NewMethod();
         MessageBox.Show("Check Username and Password", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
         saaf();
     }
 }