摘要： using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1{ class Program { static void Main(string[] args) { B<string> b = new B<string&g... 阅读全文

摘要： using System;using System.Collections.Generic;using System.Linq;using System.Text; namespace SimpleVariance{ class Animal { } class Cat: Animal { } class Program { // To understand what the new CoVar... 阅读全文