wat.cs

using System;
using System.Globalization;
using System.Threading;

namespace ConsoleApplication1
{
    internal static class Program
    {
        private static void Main()
        {
            int[] valuesToJoin = { 1, 5, -42, Int32.MinValue };
            string joined = String.Join(";", valuesToJoin);

            // writes: 1;5;-42;-2147483648
            Console.WriteLine(joined);

            Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US") { NumberFormat = { NegativeSign = "8" } };

            // writes: 1;5;842;82147483648
            joined = String.Join(";", valuesToJoin);
            Console.WriteLine(joined);
        }
    }
}