How to take all but the last element in a sequence using LINQ?

Question

Let\'s say I have a sequence.

IEnumerable sequence = GetSequenceFromExpensiveSource();
// sequence now contains: 0,1,2,3,...,999999,1000000
         


        

Answer 1

if you don't have time to roll out your own extension, here's a quicker way:

var next = sequence.First();
sequence.Skip(1)
    .Select(s => 
    { 
        var selected = next;
        next = s;
        return selected;
    });