public static NewMedicineWindow GetInstance()
{
if (instance == null)
{
instance = new NewMedicineWindow();
}
return(instance);
}
private void newMedicineMenuItem_Click(object sender, RoutedEventArgs e)
{
NewMedicineWindow.GetInstance().Show();
}
private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
instance = null;
}