using System;

using System.Collections.Generic;

using System.Net;

using System.Net.NetworkInformation;

using System.Threading.Tasks;

using System.Threading.Tasks.Dataflow;

using System.Text.RegularExpressions;

​

public class Program

{

    private static List<IPStatus> _results;

    public static async Task MyMethodAsync(IPAddress ip)

    {

        await Task.Delay(500);

        Console.WriteLine("processing");

    }

​

    public static async Task Asd()

    {

        var options = new ExecutionDataflowBlockOptions{MaxDegreeOfParallelism = 2};

        var block = new ActionBlock<IPAddress>(ip => MyMethodAsync(ip), options);

        var list = new List<IPAddress>{IPAddress.Loopback, IPAddress.Loopback, IPAddress.Loopback, IPAddress.Loopback, IPAddress.Loopback, IPAddress.Loopback, IPAddress.Loopback, IPAddress.Loopback, IPAddress.Loopback};

        foreach (var ip in list)

        {

            block.Post(ip);

        }

​

        block.Complete();

        await block.Completion;

    }

​

    public static void Main()

    {

        List<string> list = new List<string>() {

        "layout: post",

        "title: View-multiple-contents",

        "description:view multiple contents" 

    };

​

    foreach (string l in list) 

    {

        if(l.Contains((": ")))

        {

            string s = l.Replace(": ", ":");

            Console.WriteLine(s);

        }

        else

            Console.WriteLine(l);

    }

    }

}