InvalidCast.cs

using System;
using System.Linq;

namespace ConsoleApplication5
{
    public class Program
    {
        public static void Main(string[] args)
        {
            try
            {
                var intArray = new int[] {1, 2, 3, 4, 5};
                var doubleArray = intArray.Cast<double>().ToList();

                for (int i = 0; i < doubleArray.Count; i++)
                {
                    Console.WriteLine(doubleArray[i]);
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }

        }

        
    }
}