Whats the most concise way to pick a random element by weight in c#?

Question

Lets assume:

List which element is:

public class Element(){
   int Weight {get;set;}
}

What I want to a

Answer 1

// assuming rnd is an already instantiated instance of the Random class
var max = list.Sum(y => y.Weight);
var rand = rnd.Next(max);
var res = list
    .FirstOrDefault(x => rand >= (max -= x.Weight));