麻烦大家帮我看一下哪个字打错了

static void Main(string[] args)
        {
            string[]name=new string[]{"景珍","林慧洋","成蓉","洪南昌","龙玉民","单江开","田武山","王三明"};
            int[]grade=new int[]{90,65,88,70,46,81,100,68};
            int sum;
            int avg;
            for(int i=0;i<8;i++)
            {
                sum+=grade[i];
            }
            avg=sum/8;
            Console.WriteLine("平均分是"+avg+",高于平均分的有：");
            for(int n=0;n<8;n++)
            {
                if(grade[n]>avg)
                Console.Write(name[n]+" ");
            }
        }我知道不是语法的问题