public static void Do()
{
IDocument doc1 = new ColouredDocument();
doc1.Name = "Document1";
Console.WriteLine(doc1.Name);
doc1.Rename("Document2");
Console.WriteLine(doc1.Name);
}
static void Main(string[] args)
{
IDocument doc = new ColouredDocument {
Pages = 10
};
doc.AddPages(5);
Console.WriteLine(doc.Pages);
}
