关于不同类型的赋值（耦合性）

  A a = new A();
            a.Id = 1;
            A b = new A();
            b = a;
            b.Id = 2;
            Console.WriteLine("引用类型赋值");
            Console.WriteLine(a.Id.ToString());
            Console.WriteLine("--------------------------");
            A aaa = new A();
            aaa.Id = 1;
            A bbb = new A();
            bbb.Id = aaa.Id;
            bbb.Id = 2;
            Console.WriteLine(aaa.Id.ToString());
            Console.WriteLine("--------------------------");
            A aaaa = new A();
            aaaa.Id = 1;
            A bbbb = new A();
            var jsona =  JsonCommon.GetJsonToList(aaaa);
            bbbb = JsonCommon.GetJsonToList<A>(jsona);
            bbbb.Id = 2;
            Console.WriteLine(aaaa.Id.ToString());
            Console.WriteLine("--------------------------");
            var aa = 1;
            var bb = 2;
            bb = aa;
            bb = 3;
            Console.WriteLine("简单赋值");
            Console.WriteLine(aa.ToString());
            Console.WriteLine("--------------------------");
            Console.ReadLine();