public void Erase()
{
if (LastContent.IsErasable)
{
LastContent = new PaperContent(string.Empty, true);
}
}
public void Write(string content, IWritingUtensil utensil)
{
if (LastContent.Text != string.Empty)
{
PaperContent.Add(LastContent);
}
LastContent = new PaperContent(content, (utensil is IErasable));
}
public Paper()
{
PaperContent = new List <PaperContent>();
LastContent = new PaperContent(string.Empty, true);
}