static void Main()
{
Console.WriteLine("\nTextFile reference to CSVFile");
TextFile textRef = new CSVFile();
textRef.Read();
textRef.Write();
Console.WriteLine("\nISavable reference to CSVFile");
ISavable savableRef = textRef as ISavable; // as ISavable este redundant dar permite verificarea de la pasul urmator
if (savableRef != null)
{
savableRef.Read();
savableRef.Write();
}
Console.WriteLine("\nCSVFile reference to CSVFile");
CSVFile csvRef = textRef as CSVFile;
if (csvRef != null)
{
csvRef.Read();
csvRef.Write();
}
}