Question

I have a list

Class =>       Second      Third   Second  Fourth  Fifth  Second

Position =>     2           3       2       5        1     3 

I want to create new list which has Same class as well as same Positon

i.e new lists

Class  =>      Second       Second

Postion =>       2             2


Class  =>         Second

Position =>         3


Class  =>          Third

Position =>          3

and so on

can i use muliple GroupBy on parent list to produce these different list or first i should
GroupBy “Class” and then by “Position” ?

Answer 1

Group by position and class at once. One GroupBy().

For instance:

var groupedByTwoThingsAtOnce = myList
   .GroupBy(i => new { Class = i.Class, Position = i.Position });