/// <summary>
/// Gets, without removing, the top memento on the redo stack.
/// </summary>
/// <returns></returns>
public IMemento <T> PeekRedo()
{
if (redoStack.Count > 0)
{
return(redoStack.Peek());
}
else
{
return(null);
}
}
/// <summary>
/// Gets, without removing, the top memento on the undo stack
/// </summary>
/// <returns></returns>
public IMemento <T> PeekUndo()
{
if (_undoStack.Count > 0)
{
return(_undoStack.Peek());
}
else
{
return(null);
}
}