Question

Let’s say I have integer variables x and y, and I want an array populated with values x through y. Is there a nice way to do this inline, using C#?

I know I can achieve this using an extension method:

public static int[] ExpandToArray(this int x, int y)
{
    var arr = int[y - x + 1];
    for (int i = x; i <= y; i++) 
    {
        arr[i-x] = i;
    }
    return arr;
}

And then use it to write:

x.ExpandToArray(y);

Is there a built-in way (without creating an extension method) in .NET to write something like x.ExpandToArray(y)?

Answer 1

int[] numbers = Enumerable.Range(x, y - x + 1).ToArray();

Parameter #1 is start value.
Parameter #2 is count.