c# - Comparing for sorting in different ways -

i have class implements icomparable. works comparison static, i.e. it's same ordering achieves. method introduce comparison parameter, i.e. if have:

class poo : icomparable {    public int { ... };   public int b { ... };   ...  } ienumerable<foo> list = ...; list = list.sort(???); 

i' d order list respect a or b depending on parameter passed sort @ question marks. what's efficient way that?

at moment, best method i've came declare couple of methods pass sort delegates.

private static int comparewrta(foo foo1, foo foo2) { ... } private static int comparewrtb(foo foo1, foo foo2) { ... }  if(withrespecttoa)   list = list.sort(comparewrta); else   list = list.sort(comparewrtb); 

but doesn't feel best way. criticism welcome.

if want simplify statement can write this:

list.sort((x,y) => withrespecttoa ? comparewrta(x,y) : comparewrtb(x,y)); 

btw, sort method modifying list, doesn't return anything.so don't need assign list.