public void AddLiterature(PrintedEdition literature)
{
if (literature is Book)
{
Books.Add(literature as Book);
}
if (literature is Journal)
{
Journals.Add(literature as Journal);
}
if (literature is Manual)
{
Manuals.Add(literature as Manual);
}
}
public void DelLiterature(PrintedEdition literature)
{
if (literature is Book)
{
Books.Remove(literature as Book);
}
if (literature is Journal)
{
Journals.Remove(literature as Journal);
}
if (literature is Manual)
{
Manuals.Remove(literature as Manual);
}
}
public static void IAmPrinting(PrintedEdition printedEdition)
{
Console.WriteLine(printedEdition.ToString());
}
