private void btnUpdate_Click(object sender, RoutedEventArgs e)
 {
     if (_association != null)
     {
         AssociationWindow _associationWindow = new AssociationWindow(this, _association);
         _associationWindow.ShowDialog();
     }
     else
     {
         System.Windows.MessageBox.Show("You must choose an item to continue!");
     }
 }
        private void btnUpdate_Click(object sender, RoutedEventArgs e)
        {

            if (_association != null)
            {
                AssociationWindow _associationWindow = new AssociationWindow(this,_association);
                _associationWindow.ShowDialog();
            }
            else
            {
                System.Windows.MessageBox.Show("You must choose an item to continue!");
            }
        }
 private void btnNew_Click(object sender, RoutedEventArgs e)
 {
     AssociationWindow _associationWindow = new AssociationWindow(this);
     _associationWindow.ShowDialog();
 }
        private void btnNew_Click(object sender, RoutedEventArgs e)
        {
            AssociationWindow _associationWindow = new AssociationWindow(this);

            _associationWindow.ShowDialog();
        }