using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
//contact ct = new contact(); //抽象类
class1 ct1 = new class1();
class2 ct2 = new class2(); contact ct3 = new class1();
contact ct4 = new class2();
ct1.prinf();
ct2.prinf();
ct3.prinf();
ct4.prinf(); //int i = System.Console.Read();
//string str = System.Console.ReadLine();
//System.Console.Read(); System.Console.ReadLine();
} abstract public class contact
{
public virtual void prinf() //关键字virtual
{
Console.WriteLine("这是虚方法");
} }
public class class1 : contact
{
public override void prinf() //关键字override
{
Console.WriteLine("这是新的方法");
} } public class class2 : contact
{
public new void prinf() //关键字new
{
Console.WriteLine("这是另一个新的方法");
} } }
}
运行结果如下: