No connection could be made because the target computer the actively refused

Question

i am kinda new working with Asp.net Rest and i dont know how to solve this, i already read many articles at stackoverflow and no one solved my problem, i tryed firewall i tryed the configurations on internet option and other things, i think the problem can be related to something that is confusing me, do i need to run the webservice before i run my client application ?? how to do it? because what i did was just programming my rest application then i created my asp.net mvc application where i connect to the rest service with this helper

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

using System.Net.Http;
namespace ClienteMvcProdutos.Helpers
{
    public static class WebApiHttpClient
    {
        public const string WebApiBaseAddress = "http://localhost:25426/";
        public static HttpClient GetClient()
        {
            HttpClient client = new HttpClient();
            client.BaseAddress = new Uri(WebApiBaseAddress);
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(
            new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
            return client;
        }
    }
}

already checked ports and they matched, already changed ports and it still dont work im kinda desesperating :S here is my stacktrace

[SocketException (0x274d): Nenhuma ligação pôde ser feita porque o computador de destino as recusou activamente 127.0.0.1:25426] System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult) +6604828 System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception) +249

[WebException: Unable to connect to the remote server]
System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult) +606 System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar) +64

[HttpRequestException: An error occurred while sending the request.]
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58 System.Runtime.CompilerServices.TaskAwaiter1.GetResult() +28 ClientMvcProdutos.Controllers.<Index>d__1.MoveNext() in C:\Users\Filipe\Documents\Visual Studio 2015\Projects\ClientMvcProdutos\ClientMvcProdutos\Controllers\ProdutosController.cs:25 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58 System.Runtime.CompilerServices.TaskAwaiter.GetResult() +26 System.Threading.Tasks.TaskHelpersExtensions.ThrowIfFaulted(Task task) +42 System.Web.Mvc.Async.TaskAsyncActionDescriptor.EndExecute(IAsyncResult asyncResult) +73
System.Web.Mvc.Async.<>c__DisplayClass37.<BeginInvokeAsynchronousActionMethod>b__36(IAsyncResult asyncResult) +37
System.Web.Mvc.Async.WrappedAsyncResult1.CallEndDelegate(IAsyncResult asyncResult) +27
System.Web.Mvc.Async.WrappedAsyncResultBase1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +68
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +34
System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +69 System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +230 System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +27
System.Web.Mvc.Async.WrappedAsyncResult1.CallEndDelegate(IAsyncResult asyncResult) +27
System.Web.Mvc.Async.WrappedAsyncResultBase1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +68
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +42 System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +124
System.Web.Mvc.Async.WrappedAsyncResult1.CallEndDelegate(IAsyncResult asyncResult) +27
System.Web.Mvc.Async.WrappedAsyncResultBase1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +30
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +29
System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +27
System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +48
System.Web.Mvc.Async.WrappedAsyncResultBase1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +30
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +21
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +32 System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +26
System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +40
System.Web.Mvc.Async.WrappedAsyncResultBase1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +30
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +21 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +29
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +24
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +27
System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +48
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +30
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +21
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +29 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +23
System.Web.CallHandlerExecutionStep.OnAsyncHandlerCompletion(IAsyncResult ar) +129