//insert button
private void btnInsert_Click(object sender, EventArgs e)
{
Activity activity = new Activity()
{
Id = ActivityID,
ActivityName = txtBoxDescription.Text,
NumberofStudents = int.Parse(txtBoxNStudents.Text),
NumberofSupervisors = int.Parse(txtBoxNSupervisors.Text)
};
actService.AddActivity(activity);
LoadActivities();
}
