How to make Android understand C# objects -

i'm trying make asp.net webservice android application. here class:

public class student {   int studentid {get; set;}   string name {get; set;}   string phonenumber {get; set;}   list<grade> grades {get; set;} } 

the grade class is:

public class grade  {   int gradeid;   string grade; } 

when send student object using json? how can make android understand , use student object? can give me that?