/* OPEN DETAILS OF A PATIENT */
 private void lblTitle_Click(object sender, RoutedEventArgs e)
 {
     var pd = new PatientDetails(Patient);
     pd.Owner = this;
     pd.ShowDialog();
 }
 /* ADD NEW PATIENT */
 private void btnAddNewPatient_Click(object sender, RoutedEventArgs e)
 {
     var pd = new PatientDetails();
     pd.Owner = this;
     pd.ShowDialog();
 }