Getting odd/even part of a sequence with LINQ

Question

Say I have a list of all Projects, and that I group them by Category like this:

var projectsByCat = from p in Projects
                     


        

Answer 1

The oddCategories and the evenCategories are backward.

Indexes start a 0 not 1

0 % 2 = 0

0 index is odd.

var oddCategories  = projectsByCat.Where((cat, index) => index % 2 == 0);

var evenCategories = projectsByCat.Where((cat, index) => index % 2 != 0);