How to create a object from collection after grouping

Question

I have list of Students which looks like below

 

List<StudentData> results= new List<StudentData>{

new Student{Id = 1, Name = "John", CourseName = "Math", CourseStatus ="Complete"},

new Student{Id = 1, Name = "John", CourseName = "Science", CourseStatus ="In Complete"},

new Student{Id = 1, Name = "John", CourseName = "English", CourseStatus ="Complete"},

new Student{Id = 2, Name = "Sarah", CourseName = "Math", CourseStatus ="Complete"},

new Student{Id = 2, Name = "Sarah", CourseName = "Computer", CourseStatus ="Complete"},

new Student{Id = 2, Name = "John Doe", CourseName = "Account", CourseStatus ="Complete"},

}

 

I want to create a Student with list of Course out from the above collection of data.

 

Student john = new Student();

john.Id = 1 , john.Name = "John", john.Courses = new List<Course>{

new Course{Name = "Math", CourseStatus ="Complete"},

new Course{Name = "Science", CourseStatus ="In Complete"},

new Course{Name = "English", CourseStatus ="Complete"},

}

 

How do i achieve this ?

 

What I have done so far is

 

var query= results.GroupBy(s=> s.Id);

foreach (var group in query)

{

foreach (var student in group )

{

}

}