c#中 下列代码的运行结果是(a)(选择一项) struct Student{ public int age; public string name; public Student(int age,string name){ this.age=age; this.name=name; } } public class Test{ static void Mian(){ Student stu1= new Student(18,"小方"); Student stu2= new Student(24,"小刚"); stu2=stu1; stu1.age=30; stu1.name="小燕"; Console.WriteLine(stu2.age); Console.WriteLine(stu2.name); } }