Populating a list of integers in .NET

Question

I need a list of integers from 1 to x where x is set by the user. I could build it with a for loop eg assuming x is an integer set previously:

List

        

Answer 1

LINQ to the rescue:

// Adding value to existing list
var list = new List();
list.AddRange(Enumerable.Range(1, x));

// Creating new list
var list = Enumerable.Range(1, x).ToList();

See Generation Operators on LINQ 101