double array yields only zeroes

static void RunExerciseSixteen()
        {
            int[] ints = new int[10];
            Random rnd = new Random();
            double[] dbls = new double[ints.Length];

            for (int i = 0; i < ints.Length; i++)
            {
                ints[i] = rnd.Next(1, 500);
            }

            for (int i = 0; i < dbls.Length; i++)
            {
                Convert.ToDouble(dbls[i] = 1 / ints[i]);
            }

            foreach (int i in ints)
            {
                Console.WriteLine("Intsarray: " + i);
            }
            foreach (double i in dbls)
            {
                Console.WriteLine("Dblsarray: " + i); // Yields '0' repeatedly, why?
            }
        }

static void RunExerciseSixteen()
        {
            int[] ints = new int[10];
            Random rnd = new Random();
            double[] dbls = new double[ints.Length];

            for (int i = 0; i < ints.Length; i++)
            {
                ints[i] = rnd.Next(1, 500);
            }

            for (int i = 0; i < dbls.Length; i++)
            {
                Convert.ToDouble(dbls[i] = 1 / ints[i]);
            }

            foreach (int i in ints)
            {
                Console.WriteLine("Intsarray: " + i);
            }
            foreach (double i in dbls)
            {
                Console.WriteLine("Dblsarray: " + i); // Yields '0' repeatedly, why?
            }
        }