public ICommand AddCommand(ICommand command, int position = -1)
{
if (commands.IndexOf(command) > -1)
{
throw new Exception("This Command instance has already been added!!!!!!");
}
if (position > -1)
{
if (position >= commands.Count)
{
position = commands.Count;
}
commands.Insert(position, command);
}
else
{
commands.Add(command);
}
command.AddCallback(this);
return(command);
}