/// <summary>
/// Drops the command can execute.
/// </summary>
/// <param name="arg">The argument.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
private bool DropCommandCanExecute(DiagramNodeDragDropParameter arg)
{
return Enabled && !AddRemoveDisabled;
}
/// <summary>
/// Drops the command action.
/// </summary>
/// <param name="args">The arguments.</param>
private void DropCommandAction(DiagramNodeDragDropParameter args)
{
AddNode(args.DraggedItem);
}