About 值传递 与 地址传递

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Hello
{
    class Class1
    {
        public int value = 0;
    }
    struct Struct1
    {
        public int value;
    }
    class Test
    {
        static void Main()
        {
            int val1 = 0;
            int val2 = val1;
            val2 = 2;
            Console.WriteLine("Values:{0},{1}", val1, val2);
            Class1 c1 = new Class1();
            Class1 c2 = new Class1();
            c1.value = 4;
            c2 = c1;
            c1.value = 5;
            Console.WriteLine("{0},{1}", c1.value, c2.value);
            Struct1 s1;
            s1.value = 0;
            Struct1 s2 = s1;
            s2.value = 1;
            Console.WriteLine("{0},{1}", s1.value, s2.value);
        }
    }
}

val1、val2两个局部变量都是值类型（int），并且值类型的每个局部变量都有自己的存储，所以赋值不会互相改变；

相反，赋值c1.value=5;则会影响c1和c2都引用的对象；

结构类型也是值类型，所以s2的修改不会影响s1;



值类型都无需new空间，声明变量时系统自动分配空间