请问此处的CS0135错误如何解决

RT，对照视频学习C#，但是出现了视频中没有出现的错误

namespace _17
{
    class Program
    {
        static void Main(string[] args)
        {
            List<student> stuList=new List<student>();
            for (int i = 0; i < 10; i++)
            {
                student stu = new student();
                stu.age=24;
                stu.score =i;
                stuList.Add(stu);
            }
            int totalAge = 0;
            int totalScore = 0;
            foreach (var student in stuList)
            {
                totalAge += student.age;
                totalScore += student.score;
            }
            student.averageAge = totalAge / student.amount;
            student.averageScore = totalScore / student.amount;
            student.reportAmount();
            student.reportAverageAge();
            student.reportAverageScore();

        }
    }


    class student
    {
        public int age;
        public int score;
        public static int averageAge=0;
        public static int averageScore=0;
        public static int amount=0;
        public student()
        {
            student.amount++;
        }

        public static void reportAmount()
        {
            Console.WriteLine(student.amount);
        }


        public static void reportAverageAge()
        {
            Console.WriteLine(student.averageAge);
        }

        public static void reportAverageScore()
        {
            Console.WriteLine(student.averageScore);
        }
    }
}

编译器报错为：
错误    1    “student”与声明“_17.student”冲突    E:\Program Files (x86)\vs2013\工程\17\17\Program.cs    28    13    17
错误    2    “student”与声明“_17.student”冲突    E:\Program Files (x86)\vs2013\工程\17\17\Program.cs    28    45    17
错误    3    “student”与声明“_17.student”冲突    E:\Program Files (x86)\vs2013\工程\17\17\Program.cs    29    13    17
错误    4    “student”与声明“_17.student”冲突    E:\Program Files (x86)\vs2013\工程\17\17\Program.cs    29    49    17
错误    5    “student”与声明“_17.student”冲突    E:\Program Files (x86)\vs2013\工程\17\17\Program.cs    30    13    17
错误    6    “student”与声明“_17.student”冲突    E:\Program Files (x86)\vs2013\工程\17\17\Program.cs    31    13    17
错误    7    “student”与声明“_17.student”冲突    E:\Program Files (x86)\vs2013\工程\17\17\Program.cs    32    13    17

22到26行代码中的“student”有红色波浪线

该错误视频中未出现，
帮助查看器中仅显示了错误代码CS0135，未找到解决方法
求解答，希望能够指出我的代码错误