string name;
            int tem = 10;
            if (tem == 10)
            {
                name = "Neusoft";
            }
            Console.WriteLine(name);

为什么name没被赋值呢？

呵呵，确实
可是这样却也可以的

            string name;
                        
            name = "Neusoft";
            
            Console.WriteLine(name);
那么想
            string name;
            int tem = 10;
            if (tem == 10)
            {
                name = "Neusoft";
            }
            Console.WriteLine(name);
又为什么会错了