Get networks

get-networks.cs

using System.Diagnostics;
using System.Net.NetworkInformation;

namespace Prueba
{
    internal class Program
    {

        static void Main(string[] args)
        {
            MainAsync(args).GetAwaiter().GetResult();
        }

        static async Task MainAsync(string[] args)
        {
            try
            {
                decimal oNewIn = 0, oNewOut = 0, oOldIn = 0, oOldOut = 0;

                while (true)
                {
                    if (!NetworkInterface.GetIsNetworkAvailable())
                        return;

                    NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();

                    foreach (NetworkInterface ni in interfaces)
                    {
                        oNewIn = oNewIn + (decimal)ni.GetIPv4Statistics().BytesReceived;
                        oNewOut = oNewOut + (decimal)ni.GetIPStatistics().BytesSent;
                    }

                    // KB
                    oNewIn = oNewIn / 1024;
                    oNewOut = oNewOut / 1024;

                    // Validamos
                    if (oOldIn == 0 || oOldOut == 0)
                    {
                        oOldIn = oNewIn;
                        oOldOut = oNewOut;
                    }

                    // Diferencia
                    Console.WriteLine($"In {(oNewIn - oOldIn):n2} - {(oNewOut - oOldOut):n2}");

                    oOldIn = oNewIn;
                    oOldOut = oNewOut;

                    await Task.Delay(1000);
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
            }
        }
    }
}