C# this关键字

             1
            //
            构造函数-重载
             2
            public Student(int id, string name, int age, int math)
 3        {
 4this.Id = id;
 5this.Name = name;
 6this.Age = age;
 7this.Math = math;
 8        }
 910//this关键字，具有最少参数的构造器调用具有最多参数的构造器11public Student(int id, int math)
12             :this(id,"NULL",0, 100)
13        {
14         }