how to use nested list in c# for student grading system ?

Question

Stu_name	sbject	mark	grade
Nuru	java	89	A
	VB	90	A
	C#	78	B
	C++	67	C

                                                            GPA    =       3.4   

 

 

Stu_name	sbject	mark	grade
Liza	java	89	A
	VB	90	A
	C#	78	B
	C++	67	C

                                                               GPA     =     3.4

  

my question is to display in the above format?