Run Multiple Parallel Process And Wait For Completion-Host Application

class Program
{
    static List<T>[] Partition<T>(List<T> list, int totalPartitions)
    {
        if (list == null)
            throw new ArgumentNullException("list");
 
        if (totalPartitions < 1)
            throw new ArgumentOutOfRangeException("totalPartitions");
 
        List<T>[] partitions = new List<T>[totalPartitions];
 
        int maxSize = (int)Math.Ceiling(list.Count / (double)totalPartitions);
        int k = 0;
 
        for (int i = 0; i < partitions.Length; i++)
        {
            partitions[i] = new List<T>();
            for (int j = k; j < k + maxSize; j++)
            {
                if (j >= list.Count)
                    break;
                partitions[i].Add(list[j]);
            }
            k += maxSize;
        }
 
        return partitions;
    }
 
    private static string Serialize<T>(T obj)
    {
        using (var stream = new MemoryStream())
        {
            var formatter = new BinaryFormatter();
            formatter.Serialize(stream, obj);
            stream.Flush();
            stream.Position = 0;
            return Convert.ToBase64String(stream.ToArray());
        }
    }
    static void Main(string[] args)
    {
        try
        {
            string fileName = "urllist.txt";
            int subProcessCount = 10;
            var urlList = File.ReadAllLines(fileName).ToList();
            var jobList = Partition(urlList, subProcessCount);
            var workingDirectory = Environment.CurrentDirectory;
            var subProcessName = "ChildApp.exe";
                 
            Console.WriteLine("Start");
            Parallel.For(0, subProcessCount, i =>
            {
                var arg = new ProcessArg();
                arg.UrlList = jobList[i];
                var argString = Serialize(arg);
                Console.WriteLine("Child process {0} started", i);
                CreateChildProcess(workingDirectory, subProcessName, argString);
            });
            Console.WriteLine("All processes are completed");
            Console.Read();
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        Console.Read();
    }
    private static void CreateChildProcess(string workingDirectory,
        string jobProcessName, string jobProcessArg)
    {
        var process = new Process();
        process.StartInfo.FileName = jobProcessName;
        process.StartInfo.WorkingDirectory = workingDirectory;
        process.StartInfo.CreateNoWindow = true;
        process.StartInfo.Arguments = jobProcessArg;
        process.Start();
        process.WaitForExit();
    }
}