"Specified cast is not valid" when casting array of string to array of int

Question

I'm trying to use LINQ's cast method to cast an array of strings to an array of integers but getting the error: Specified cast is not valid, what am I doing wrong? Thanks!

string numbers = "1,2,3,4,5";
string[] nums = numbers.Split(',');

try
{
     var ff = nums.Cast<int>().ToArray();
}
catch (Exception ex)
{

}

Answer 1

You cannot cast it, you must convert the values:

var ff = nums.Select(x => Convert.ToInt32(x)).ToArray();

Answer 2

A bit shorter:

var ff = nums.Select(int.Parse).ToArray();