private void btnExit_Click(object sender, EventArgs e)
{
ConferenceManagementForm conmaga = new ConferenceManagementForm();
this.Close();
conmaga.Show();
}
private void tsbManageCon_Click(object sender, EventArgs e)
{
ConferenceManagementForm conferencemanagementform = new ConferenceManagementForm();
conferencemanagementform.emp = employee;
conferencemanagementform.ShowDialog();
}