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

I'm one of many who has blogged about a ruby-esque To extension method that you can write if you're using C#3.0:

public static class IntegerExtensions
{
    public static IEnumerable To(this int first, int last)
    {
        for (int i = first; i <= last; i++)

        { 
            yield return i;
        } 
    }
}

Then you can create your list of integers like this

List = first.To(last).ToList();

or

List = 1.To(x).ToList();