- using static System.Console; 
-   
- class A { 
-     virtual public void metodo1() => WriteLine("A"); 
-     public void metodo2() => WriteLine("A"); 
- } 
- class B : A { 
-     override public void metodo1() => WriteLine("B"); 
-     public void metodo2() => WriteLine("B"); 
- } 
-   
- public class HelloWorld { 
-      public static void Main() { 
-         A a = new A(); 
-         a.metodo1(); 
-         A b = new B(); 
-         b.metodo1(); 
-         A c = new B(); 
-         c.metodo2(); 
-      } 
- } 
-   
- //https://pt.stackoverflow.com/q/89218/101 
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