/*
public static void Main(){
start();
}
*/
private static void start()
{
BaseClass derived = new DerivedClass();
derived.add(5,5);
DerivedClass d2 = new DerivedClass();
d2.add(3,3);
}
static void Main()
{
DerivedClass instance = new DerivedClass();
instance.field1 = 1;
instance.field2 = 2;
instance.field3 = 3;
instance.field4 = 4;
instance.field5 = 5;
// Приведение экземпляра класса DerivedClass к базовому типу BaseClass.
BaseClass newInstance = (BaseClass)instance; // Upcast
Console.WriteLine(newInstance.field1);
Console.WriteLine(newInstance.field2);
Console.WriteLine(newInstance.field3);
//Console.WriteLine(newInstance.field4);
//Console.WriteLine(newInstance.field5);
// Проверка.
Console.WriteLine("instance Id {0}", instance.GetHashCode());
Console.WriteLine("newInstance Id {0}", newInstance.GetHashCode());
// Delay.
Console.ReadKey();
}
static void Main()
{
DerivedClass instance = new DerivedClass();
instance.Method();
// Delay.
Console.ReadKey();
}
static void Main(string[] args)
{
// AbClass a = new AbClass(); // Error. Cannot instantiate an abstract class.
// a.IdentifyDerived();
DerivedClass b = new DerivedClass(); // Instantiate the derived class.
b.IdentifyBase(); // Call the inherited method.
b.IdentifyDerived(); // Call the "abstract" method.
}
static void Main()
{
DerivedClass instance = new DerivedClass();
Console.WriteLine(instance.publicField);
// Delay.
Console.ReadKey();
}
static void Main()
{
DerivedClass instance = new DerivedClass();
instance.Method();
// UpCast
BaseClass instanceUp = instance as BaseClass;
instanceUp.Method();
// DownCast
DerivedClass instanceDown = instanceUp as DerivedClass;
instanceDown.Method();
// Delay.
Console.ReadKey();
}
