static void Main()
{
MyDerivedClass derived = new MyDerivedClass();
MyBaseClass mybc = (MyBaseClass)derived;
derived.Print();
mybc.Print();
}
static void Main() // Main
{
SecondDerived derived = new SecondDerived(); // Use SecondDerived.
MyBaseClass mybc = (MyBaseClass)derived; // Use MyBaseClass.
derived.Print();
mybc.Print();
}
static void Main()
{
MyDerivedClass derived = new MyDerivedClass();
MyBaseClass mybc = (MyBaseClass)derived;
derived.Print(); // Call Print from derived portion.
mybc.Print(); // Call Print from base portion.
}
static void Main()
{
MyDerivedClass derived = new MyDerivedClass();
MyBaseClass mybc = (MyBaseClass)derived;
derived.Print(); // Call Print from derived portion.
mybc.Print(); // Call Print from base portion.
// mybc.var1 = 5; // Error: base class reference cannot
// access derived class members.
}
public void _01()
{
var derived = new MyDerivedClass();
derived.Print();
// 父类变量指向子类对象, 通过父类变量只能访问父类成员
MyBaseClass mybc = derived;
mybc.Print();
}
public void _01()
{
var derived = new MyDerivedClass();
derived.Print();
// 父类变量指向子类对象, 通过父类变量只能访问父类成员,
// 但是如果这个成员在父类是标记为 virtual, 在子类是标记为 override, 则此时访问的是子类成员.
MyBaseClass mybc = derived;
mybc.Print();
}