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<int> iList = new List<int>();
for (int i = 1; i <= x; i++)
{
    iList.Add(i);
}

This seems dumb, surely there's a more elegant way to do this, something like the PHP range method

Answer 1

LINQ to the rescue:

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

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

See Generation Operators on LINQ 101

Answer 2

If your using .Net 3.5, Enumerable.Range is what you need.

Generates a sequence of integral numbers within a specified range.

Answer 3

LINQ to the rescue:

List list = from i in Sequence.Range(1, x) select i;