Sum Of 3 Numbers

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Threading;
using System.Globalization;

namespace _01.SumOfNumbers
{
    class SumOfNumbers
    {
        static void Main()
        {
            Console.Write("How many times would you like to sum numbers?: ");
            int examples = int.Parse(Console.ReadLine());
            double[] a = new double[examples];
            double[] b = new double[examples];
            double[] c = new double[examples];
            string[] sum = new string[examples];
            for (int i = 0; i < examples; i++)
            {
                System.Threading.Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
                Console.Write("Enter your first number: ");
                a[i] = double.Parse(Console.ReadLine());
                Console.Write("Enter your second number: ");
                b[i] = double.Parse(Console.ReadLine());
                Console.Write("Enter your third number: ");
                c[i] = double.Parse(Console.ReadLine());
                sum[i] = Convert.ToString(a[i] + b[i] + c[i]);
            }
            Console.WriteLine("|{0,-8}|{1,-8}|{2,-8}|{3,-8}|", "Number a", "Number b", "Number c", "Sum");
            for (int i = 0; i < examples; i++)
            {
                Console.WriteLine("|{0,-8}|{1,-8}|{2,-8}|{3,-8}|", a[i], b[i], c[i], sum[i]);
            }
        }
    }
}