I need to group data of a list in c#

ex: i have a data like this in a list c#

i have a class called information.cs with these properties name,school, parent

ex data

 name    school  parent

kumar      fes         All

manju      fes         kumar

anu         frank       kumar

anitha      jss          All

rohit       frank       manju

anill        vijaya      manju

vani         jss          kumar

soumya   jss           kumar

madhu     jss          rohit

 shiva       jss          rohit

vanitha       jss          anitha
 anu      jss          anitha

now taking this as an input i wanted the output to be formated with a Hierarchical data when parent is all means it is the topmost level kumar fes All. what i need to do here is i need to create an object[0] and then check in list whether kumar exists as a parent in the list if it exista then add those items as under the object[0] as a parent

i need  to create one more oject under
**manju      fes         kumar

anu         frank       kumar**

what i wanted do here is iterate through the list anD then check the parent level based on

name school parent

kumar      fes         All -->obj[0]

manju      fes         kumar -->obj1[0]

anu         frank       kumar -->obj1[1]

for obj1--> obj[0] will be parent like this i need to genarte a list or observation class

    anitha      jss          All-->obj[1]
   vanitha       jss          anitha -->obj1[0]
       anu      jss           vanitha -->obj2[0]

here obj2[0]-->obj1[0]-->obj[1] will be an parent

like this i need to create a list or an observationclass hope my Question is clear what i am trying ask you people. i wanted to know how i can create an observationclass. any help would be really great.

hope my question is clear