HTTP could not register URL http://+:8000/HelloWCF/. Your process does not have access rights to this namespace.

using System;
using System.ServiceModel;

namespace EssentialWCF
{
    [ServiceContract]
    public interface IStockService
    {
        [OperationContract]
        double GetPrice(string ticker);
    }

    public class StockService : IStockService
    {
        public double GetPrice(string ticker)
        {
            return 94.85;
        }
    }

    class Service
    {
        static void Main(string[] args)
        {
            ServiceHost serviceHost = new ServiceHost(typeof(StockService),
                                                        new Uri("http://localhost:8000/HelloWCF"));

            serviceHost.AddServiceEndpoint(typeof(IStockService), new BasicHttpBinding(), "");
            serviceHost.Open();

            Console.WriteLine("To continue press <ENTER>.\n\n");

            serviceHost.Close();
        }
    }
}

Quote:

HTTP could not register URL http://+:8000/HelloWCF/. Your process does not have access rights to this namespace (see http://go.microsoft.com/fwlink/?LinkId=70353 for details).