DesignPatternsInUse/src/Command/CommandManager.cs at master · prashanth1003/DesignPatternsInUse · GitHub

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public class CommandManager
{
    private Stack<ICommand> _undoStack = new Stack<ICommand>();
    private Stack<ICommand> _redoStack = new Stack<ICommand>();

    public void ExecuteCommand(ICommand command)
    {
        command.Execute();
        _undoStack.Push(command);
        _redoStack.Clear();
    }

    public void Undo()
    {
        if (_undoStack.Count > 0)
        {
            ICommand command = _undoStack.Pop();
            command.Undo();
            _redoStack.Push(command);
        }
    }

    public void Redo()
    {
        if (_redoStack.Count > 0)
        {
            ICommand command = _redoStack.Pop();
            command.Execute();
            _undoStack.Push(command);
        }
    }
}