diff --git a/TestApp/MyService.cs b/TestApp/MyService.cs
index d39dc6e..213cf4e 100644
--- a/TestApp/MyService.cs
+++ b/TestApp/MyService.cs
@@ -32,24 +32,18 @@ namespace TestApp
             });
 
             Exchange.RoutesStorage.Set("test.app", new IPEndPoint(IPAddress.Loopback, 8800));
-            using (var waiter = new ManualResetEventSlim(false))
+
+            while (true)
             {
-                while (true)
+                try
+                {
+                    //var s = Exchange.Request<int>("test.app", "counter");
+                    Interlocked.Add(ref counter, Exchange.Request<int>("test.app", "counter"));
+                }
+                catch(Exception ex)
                 {
-                    try
-                    {
-                        Exchange.GetConnection("test.app")?.Request<int>("counter", s =>
-                        {
-                            waiter.Set();
-                            Interlocked.Add(ref counter, s);
-                        });
-                    }
-                    catch
-                    {
-                        Thread.Sleep(300);
-                    }
-                    waiter.Wait();
-                    waiter.Reset();
+                    Log.Error(ex, "Request fault");
+                    Thread.Sleep(300);
                 }
             }
         }
diff --git a/TestApp/Program.cs b/TestApp/Program.cs
index 171e65e..f372b67 100644
--- a/TestApp/Program.cs
+++ b/TestApp/Program.cs
@@ -1,6 +1,7 @@
 using Newtonsoft.Json;
 using System;
 using ZeroLevel;
+using ZeroLevel.Logging;
 using ZeroLevel.Services.Web;
 
 namespace TestApp
@@ -21,17 +22,6 @@ namespace TestApp
 
         private static void Main(string[] args)
         {
-            var t = new TestQuery
-            {
-                Age = 133,
-                Roles = new[] { "ad\"\"\"min", "user", "operator" },
-                Name = "su"
-            };
-            var builder = new UrlBuilder(Serialize);
-            var url = builder.BuildRequestUrlFromDTO("http://google.com", "/api/v0/getuserinfo", t);
-            Console.WriteLine(url);
-            Console.ReadKey();
-
             /*var fiber = new Fiber();
             fiber
                 .Add((s) => { Console.WriteLine("1"); s.Add<int>("1", 1); return s; })
@@ -51,15 +41,15 @@ namespace TestApp
 
 
 
-            /*Configuration.Save(Configuration.ReadFromApplicationConfig());
+            Configuration.Save(Configuration.ReadFromApplicationConfig());
             Bootstrap.Startup<MyService>(args,
                 () => Configuration.ReadSetFromIniFile("config.ini"))
-                .EnableConsoleLog(ZeroLevel.Services.Logging.LogLevel.System | ZeroLevel.Services.Logging.LogLevel.FullDebug)
+                .EnableConsoleLog(LogLevel.System | LogLevel.FullDebug)
                 //.UseDiscovery()
                 .Run()
                 .WaitWhileStatus(ZeroServiceStatus.Running)
                 .Stop();
-            Bootstrap.Shutdown();*/
+            Bootstrap.Shutdown();
         }
     }
 }
\ No newline at end of file
diff --git a/TestPipeLine/Source/SourceService.cs b/TestPipeLine/Source/SourceService.cs
index 83ba7c4..4f4c855 100644
--- a/TestPipeLine/Source/SourceService.cs
+++ b/TestPipeLine/Source/SourceService.cs
@@ -40,7 +40,7 @@ namespace Source
                                 Interlocked.Increment(ref _proceed);
                                 waiter.Set();
                             });
-                            if (ir == null || ir.Success == false)
+                            if (ir == null || ir == false)
                             {
                                 Thread.Sleep(300);
                                 waiter.Set();
diff --git a/ZeroLevel.UnitTests/DumpTests.cs b/ZeroLevel.UnitTests/DumpTests.cs
index 8f4716b..f839d91 100644
--- a/ZeroLevel.UnitTests/DumpTests.cs
+++ b/ZeroLevel.UnitTests/DumpTests.cs
@@ -9,6 +9,7 @@ namespace ZeroLevel.UnitTests
     // In developing, not working!
     public class DumpTests
     {
+        /*
         [Fact]
         public void DumpStorageTest()
         {
@@ -59,5 +60,6 @@ namespace ZeroLevel.UnitTests
             }
             Assert.True(0 == storage.ReadAndTruncate().ToArray().Length);
         }
+        */
     }
 }
diff --git a/ZeroLevel.UnitTests/ExchangeTests.cs b/ZeroLevel.UnitTests/ExchangeTests.cs
index 1ee5a42..52fd638 100644
--- a/ZeroLevel.UnitTests/ExchangeTests.cs
+++ b/ZeroLevel.UnitTests/ExchangeTests.cs
@@ -37,7 +37,7 @@ namespace ZeroLevel.NetworkUnitTests
             locker.WaitOne(1000);
 
             // Assert
-            Assert.True(ir.Success);
+            Assert.True(ir);
             Assert.True(info.Equals(received));
 
             // Dispose
@@ -85,7 +85,7 @@ namespace ZeroLevel.NetworkUnitTests
             locker.WaitOne(1000);
 
             // Assert
-            Assert.True(ir.Success);
+            Assert.True(ir);
             Assert.True(CollectionComparsionExtensions.OrderingEquals(new[] { info1, info2 }, received, (a, b) => a.Equals(b)));
 
             // Dispose
diff --git a/ZeroLevel.UnitTests/NetworkTest.cs b/ZeroLevel.UnitTests/NetworkTest.cs
index befabf3..dcd0136 100644
--- a/ZeroLevel.UnitTests/NetworkTest.cs
+++ b/ZeroLevel.UnitTests/NetworkTest.cs
@@ -3,7 +3,7 @@ using System.Threading;
 using Xunit;
 using ZeroLevel.Services.Applications;
 
-namespace ZeroLevel.UnitTests
+namespace ZeroLevel.Network
 {
     public class NetworkTest
         : BaseZeroService
@@ -13,45 +13,54 @@ namespace ZeroLevel.UnitTests
         {
             // Arrange
             var server = UseHost(8181);
-            var client = Exchange.GetConnection("127.0.0.1:8181");
+            Exchange.RoutesStorage.Set("test", NetUtils.CreateIPEndPoint("127.0.0.1:8181"));
 
             bool got_message_no_request = false;
             bool got_message_with_request = false;
             bool got_response_message_no_request = false;
             bool got_response_message_with_request = false;
 
-            using (var signal = new ManualResetEvent(false))
+            server.RegisterInbox("empty", (_) =>
             {
-                server.RegisterInbox("empty", (_) => { signal.Set(); got_message_no_request = true; });
-                server.RegisterInbox<string>((_, ___) => { signal.Set(); got_message_with_request = true; });
-                server.RegisterInbox<string>("get_response", (_) => "Hello");
-                server.RegisterInbox<int, string>("convert", (__, num) => num.ToString());
-
-                // Act
-                signal.Reset();
-                client.Send("empty");
-                signal.WaitOne(1000);
+                got_message_no_request = true;
+            });
+            server.RegisterInbox<string>((_, ___) =>
+            {
+                got_message_with_request = true;
+            });
+            server.RegisterInbox<string>("get_response", (_) => "Hello");
+            server.RegisterInbox<int, string>("convert", (__, num) => num.ToString());
 
-                signal.Reset();
-                client.Send<string>("hello");
-                signal.WaitOne(100);
+            Thread.Sleep(200);
 
-                signal.Reset();
-                client.Request<string>("get_response", (s) => { signal.Set(); got_response_message_no_request = s.Equals("Hello", StringComparison.Ordinal); });
-                signal.WaitOne(1000);
+            Assert.True(Exchange.Peek("test", "empty"));
+            Assert.True(Exchange.Send<string>("test", "hello"));
 
-                signal.Reset();
-                client.Request<int, string>("convert", 10, (s) => { signal.Set(); got_response_message_with_request = s.Equals("10", StringComparison.Ordinal); });
-                signal.WaitOne(1000);
+            int repeat = 10;
+            while (!got_message_no_request || !got_message_with_request)
+            {
+                Thread.Sleep(200);
+                repeat--;
+                if (repeat == 0) break;
             }
 
-
-
             // Assert
             Assert.True(got_message_no_request, "No signal for no request default inbox");
             Assert.True(got_message_with_request, "No signal for default inbox");
-            Assert.True(got_response_message_no_request, "No response without request");
-            Assert.True(got_response_message_with_request, "No response with request");
+
+            for (int i = 0; i < 100; i++)
+            {
+                got_response_message_no_request =
+                    Exchange.Request<string>("test", "get_response")
+                    .Equals("Hello", StringComparison.Ordinal);
+
+                got_response_message_with_request =
+                    Exchange.Request<int, string>("test", "convert", 10)
+                    .Equals("10", StringComparison.Ordinal);
+
+                Assert.True(got_response_message_no_request, "No response without request");
+                Assert.True(got_response_message_with_request, "No response with request");
+            }
         }
 
         protected override void StartAction()
diff --git a/ZeroLevel.UnitTests/SemanticTests.cs b/ZeroLevel.UnitTests/SemanticTests.cs
index 510486b..947317c 100644
--- a/ZeroLevel.UnitTests/SemanticTests.cs
+++ b/ZeroLevel.UnitTests/SemanticTests.cs
@@ -1,11 +1,8 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
+using System.Linq;
 using Xunit;
 using ZeroLevel.Services.Semantic;
 
-namespace ZeroLevel.UnitTests
+namespace ZeroLevel.Semantic
 {
     public class SemanticTests
     {
diff --git a/ZeroLevel.UnitTests/TrieTests.cs b/ZeroLevel.UnitTests/TrieTests.cs
index b191a91..bb0b195 100644
--- a/ZeroLevel.UnitTests/TrieTests.cs
+++ b/ZeroLevel.UnitTests/TrieTests.cs
@@ -2,7 +2,7 @@
 using ZeroLevel.Services.Semantic;
 using ZeroLevel.Services.Serialization;
 
-namespace ZeroLevel.UnitTests
+namespace ZeroLevel.Tries
 {
     public class TrieTests
     {
diff --git a/ZeroLevel/Models/InvokeResult.cs b/ZeroLevel/Models/InvokeResult.cs
index 2b61570..9f7ec1a 100644
--- a/ZeroLevel/Models/InvokeResult.cs
+++ b/ZeroLevel/Models/InvokeResult.cs
@@ -99,6 +99,8 @@ namespace ZeroLevel.Models
 
         #region Ctor
 
+        public InvokeResult() { }
+
         public InvokeResult(bool success, string comment)
         {
             Success = success;
diff --git a/ZeroLevel/Services/Network/Contracts/IClient.cs b/ZeroLevel/Services/Network/Contracts/IClient.cs
index 989fb81..afd8aa7 100644
--- a/ZeroLevel/Services/Network/Contracts/IClient.cs
+++ b/ZeroLevel/Services/Network/Contracts/IClient.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Net;
-using ZeroLevel.Models;
 
 namespace ZeroLevel.Network
 {
@@ -12,15 +11,14 @@ namespace ZeroLevel.Network
         IRouter Router { get; }
         ISocketClient Socket { get; }
 
-        InvokeResult Send<T>(T message);
+        bool Send<T>(T message);
+        bool Send(string inbox);
+        bool Send(string inbox, byte[] data);
+        bool Send<T>(string inbox, T message);
 
-        InvokeResult Send(string inbox);
-        InvokeResult Send(string inbox, byte[] data);
-        InvokeResult Send<T>(string inbox, T message);
-
-        InvokeResult Request(string inbox, Action<byte[]> callback);
-        InvokeResult Request(string inbox, byte[] data, Action<byte[]> callback);
-        InvokeResult Request<Tresponse>(string inbox, Action<Tresponse> callback);
-        InvokeResult Request<Trequest, Tresponse>(string inbox, Trequest request, Action<Tresponse> callback);
+        bool Request(string inbox, Action<byte[]> callback);
+        bool Request(string inbox, byte[] data, Action<byte[]> callback);
+        bool Request<Tresponse>(string inbox, Action<Tresponse> callback);
+        bool Request<Trequest, Tresponse>(string inbox, Trequest request, Action<Tresponse> callback);
     }
 }
diff --git a/ZeroLevel/Services/Network/Contracts/IClientSet.cs b/ZeroLevel/Services/Network/Contracts/IClientSet.cs
index c3a68b4..eb19809 100644
--- a/ZeroLevel/Services/Network/Contracts/IClientSet.cs
+++ b/ZeroLevel/Services/Network/Contracts/IClientSet.cs
@@ -1,13 +1,15 @@
 using System;
 using System.Collections.Generic;
-using ZeroLevel.Models;
 
 namespace ZeroLevel.Network
 {
     public interface IClientSet
-    {
-        bool Send<T>(string alias, T data);
+    {        
+        bool Send<T>(string alias, T data);        
         bool Send<T>(string alias, string inbox, T data);
+
+        bool Peek(string alias, string inbox);
+
         bool Request<Tresponse>(string alias, Action<Tresponse> callback);
         bool Request<Tresponse>(string alias, string inbox, Action<Tresponse> callback);
         bool Request<Trequest, Tresponse>(string alias, Trequest request, Action<Tresponse> callback);
diff --git a/ZeroLevel/Services/Network/ExClient.cs b/ZeroLevel/Services/Network/ExClient.cs
index 18dcb7f..cb83b0d 100644
--- a/ZeroLevel/Services/Network/ExClient.cs
+++ b/ZeroLevel/Services/Network/ExClient.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Net;
-using ZeroLevel.Models;
 using ZeroLevel.Services.Serialization;
 
 namespace ZeroLevel.Network
@@ -19,146 +18,146 @@ namespace ZeroLevel.Network
             _client = client;
         }
 
-        public InvokeResult Send(string inbox)
+        public bool Send(string inbox)
         {
             try
             {
                 _client.Send(Frame.FromPool(inbox));
+                return true;
             }
             catch (Exception ex)
             {
-                Log.Error(ex, "[NetworkNode.Send]");
-                return InvokeResult.Fault(ex.Message);
+                Log.Error(ex, "[NetworkNode.Send(inbox)]");
             }
-            return InvokeResult.Succeeding();
+            return false;
         }
 
-        public InvokeResult Send(string inbox, byte[] data)
+        public bool Send(string inbox, byte[] data)
         {
             try
             {
                 _client.Send(Frame.FromPool(inbox, data));
+                return true;
             }
             catch (Exception ex)
             {
-                Log.Error(ex, "[NetworkNode.Send]");
-                return InvokeResult.Fault(ex.Message);
+                Log.Error(ex, "[NetworkNode.Send(inbox, data)]");
             }
-            return InvokeResult.Succeeding();
+            return false;
         }
 
-        public InvokeResult Send<T>(T message)
+        public bool Send<T>(T message)
         {
             try
             {
                 _client.Send(Frame.FromPool(BaseSocket.DEFAULT_MESSAGE_INBOX, MessageSerializer.SerializeCompatible<T>(message)));
+                return true;
             }
             catch (Exception ex)
             {
-                Log.Error(ex, "[NetworkNode.Send]");
-                return InvokeResult.Fault(ex.Message);
+                Log.Error(ex, "[NetworkNode.Send(message)]");
             }
-            return InvokeResult.Succeeding();
+            return false;
         }
 
-        public InvokeResult Send<T>(string inbox, T message)
+        public bool Send<T>(string inbox, T message)
         {
             try
             {
                 _client.Send(Frame.FromPool(inbox, MessageSerializer.SerializeCompatible<T>(message)));
+                return true;
             }
             catch (Exception ex)
             {
-                Log.Error(ex, "[NetworkNode.Send]");
-                return InvokeResult.Fault(ex.Message);
+                Log.Error(ex, "[NetworkNode.Send(inbox, message)]");
             }
-            return InvokeResult.Succeeding();
+            return false;
         }
 
-        public InvokeResult Request(string inbox, Action<byte[]> callback)
+        public bool Request(string inbox, Action<byte[]> callback)
         {
             try
             {
                 _client.Request(Frame.FromPool(inbox), f => callback(f));
+                return true;
             }
             catch (Exception ex)
             {
-                Log.Error(ex, "[NetworkNode.Request]");
-                return InvokeResult.Fault(ex.Message);
+                Log.Error(ex, "[NetworkNode.Request(inbox, callback)]");
             }
-            return InvokeResult.Succeeding();
+            return false;
         }
 
-        public InvokeResult Request(string inbox, byte[] data, Action<byte[]> callback)
+        public bool Request(string inbox, byte[] data, Action<byte[]> callback)
         {
             try
             {
                 _client.Request(Frame.FromPool(inbox, data), f => callback(f));
+                return true;
             }
             catch (Exception ex)
             {
-                Log.Error(ex, "[NetworkNode.Request]");
-                return InvokeResult.Fault(ex.Message);
+                Log.Error(ex, "[NetworkNode.Request(inbox, data, callback)]");
             }
-            return InvokeResult.Succeeding();
+            return false;
         }
 
-        public InvokeResult Request<Tresponse>(string inbox, Action<Tresponse> callback)
+        public bool Request<Tresponse>(string inbox, Action<Tresponse> callback)
         {
             try
             {
                 _client.Request(Frame.FromPool(inbox), f => callback(MessageSerializer.DeserializeCompatible<Tresponse>(f)));
+                return true;
             }
             catch (Exception ex)
             {
-                Log.Error(ex, "[NetworkNode.Request]");
-                return InvokeResult.Fault(ex.Message);
+                Log.Error(ex, "[NetworkNode.Request(inbox, callback)]");
             }
-            return InvokeResult.Succeeding();
+            return false;
         }
 
-        public InvokeResult Request<Tresponse>(Action<Tresponse> callback)
+        public bool Request<Tresponse>(Action<Tresponse> callback)
         {
             try
             {
                 _client.Request(Frame.FromPool(BaseSocket.DEFAULT_REQUEST_INBOX), f => callback(MessageSerializer.DeserializeCompatible<Tresponse>(f)));
+                return true;
             }
             catch (Exception ex)
             {
-                Log.Error(ex, "[NetworkNode.Request]");
-                return InvokeResult.Fault(ex.Message);
+                Log.Error(ex, "[NetworkNode.Request(callback)]");
             }
-            return InvokeResult.Succeeding();
+            return false;
         }
 
-        public InvokeResult Request<Trequest, Tresponse>(string inbox, Trequest request, Action<Tresponse> callback)
+        public bool Request<Trequest, Tresponse>(string inbox, Trequest request, Action<Tresponse> callback)
         {
             try
             {
                 _client.Request(Frame.FromPool(inbox, MessageSerializer.SerializeCompatible<Trequest>(request)),
                     f => callback(MessageSerializer.DeserializeCompatible<Tresponse>(f)));
+                return true;
             }
             catch (Exception ex)
             {
-                Log.Error(ex, "[NetworkNode.Request]");
-                return InvokeResult.Fault(ex.Message);
+                Log.Error(ex, "[NetworkNode.Request(inbox, request, callback)]");
             }
-            return InvokeResult.Succeeding();
+            return false;
         }
 
-        public InvokeResult Request<Trequest, Tresponse>(Trequest request, Action<Tresponse> callback)
+        public bool Request<Trequest, Tresponse>(Trequest request, Action<Tresponse> callback)
         {
             try
             {
                 _client.Request(Frame.FromPool(BaseSocket.DEFAULT_REQUEST_WITHOUT_ARGS_INBOX, MessageSerializer.SerializeCompatible<Trequest>(request)),
                     f => callback(MessageSerializer.DeserializeCompatible<Tresponse>(f)));
+                return true;
             }
             catch (Exception ex)
             {
-                Log.Error(ex, "[NetworkNode.Request]");
-                return InvokeResult.Fault(ex.Message);
+                Log.Error(ex, "[NetworkNode.Request(request, callback)]");
             }
-            return InvokeResult.Succeeding();
+            return false;
         }
 
         public void Dispose()
diff --git a/ZeroLevel/Services/Network/Exchange.cs b/ZeroLevel/Services/Network/Exchange.cs
index 8c4abc5..6767d14 100644
--- a/ZeroLevel/Services/Network/Exchange.cs
+++ b/ZeroLevel/Services/Network/Exchange.cs
@@ -32,7 +32,10 @@ namespace ZeroLevel.Network
         #endregion Ctor
 
         #region IMultiClient      
-
+        public bool Peek(string alias, string inbox)
+        {
+            return CallService(alias, (transport) => transport.Send(inbox));
+        }
         /// <summary>
         /// Sending a message to the service
         /// </summary>
@@ -41,7 +44,7 @@ namespace ZeroLevel.Network
         /// <returns></returns>
         public bool Send<T>(string alias, T data)
         {
-            return CallService(alias, (transport) => transport.Send<T>(BaseSocket.DEFAULT_MESSAGE_INBOX, data).Success);
+            return CallService(alias, (transport) => transport.Send<T>(BaseSocket.DEFAULT_MESSAGE_INBOX, data));
         }
 
         /// <summary>
@@ -53,7 +56,7 @@ namespace ZeroLevel.Network
         /// <returns></returns>
         public bool Send<T>(string alias, string inbox, T data)
         {
-            return CallService(alias, (transport) => transport.Send<T>(inbox, data).Success);
+            return CallService(alias, (transport) => transport.Send<T>(inbox, data));
         }
 
         /// <summary>
@@ -75,15 +78,19 @@ namespace ZeroLevel.Network
         /// <returns>true - on successful submission</returns>
         public bool SendBroadcast<T>(string alias, string inbox, T data)
         {
+            var result = false;
             try
             {
-                foreach (var client in GetClientEnumerator(alias))
+                var clients = GetClientEnumerator(alias).ToArray();
+                var tasks = new Task[clients.Length];
+                int index = 0;
+                foreach (var client in clients)
                 {
-                    Task.Run(() =>
+                    tasks[index++] = Task.Run(() =>
                     {
                         try
                         {
-                            client.Send(inbox, data);
+                            result |= client.Send(inbox, data);
                         }
                         catch (Exception ex)
                         {
@@ -91,12 +98,13 @@ namespace ZeroLevel.Network
                         }
                     });
                 }
+                Task.WaitAll(tasks);
             }
             catch (Exception ex)
             {
                 Log.SystemError(ex, $"[Exchange.SendBroadcast] Error broadcast send data in service '{alias}'. Inbox '{inbox}'");
             }
-            return false;
+            return result;
         }
 
         /// <summary>
@@ -109,15 +117,19 @@ namespace ZeroLevel.Network
         /// <returns>true - on successful submission</returns>
         public bool SendBroadcastByType<T>(string type, string inbox, T data)
         {
+            var result = false;
             try
             {
-                foreach (var client in GetClientEnumeratorByType(type))
+                var clients = GetClientEnumeratorByType(type).ToArray();
+                var tasks = new Task[clients.Length];
+                int index = 0;
+                foreach (var client in clients)
                 {
-                    Task.Run(() =>
+                    tasks[index++] = Task.Run(() =>
                     {
                         try
                         {
-                            client.Send(inbox, data);
+                            result |= client.Send(inbox, data);
                         }
                         catch (Exception ex)
                         {
@@ -125,12 +137,13 @@ namespace ZeroLevel.Network
                         }
                     });
                 }
+                Task.WaitAll(tasks);
             }
             catch (Exception ex)
             {
                 Log.SystemError(ex, $"[Exchange.SendBroadcastByType] Error broadcast send data to services with type '{type}'. Inbox '{inbox}'");
             }
-            return false;
+            return result;
         }
 
         /// <summary>
@@ -153,15 +166,19 @@ namespace ZeroLevel.Network
         /// <returns>true - on successful submission</returns>
         public bool SendBroadcastByGroup<T>(string group, string inbox, T data)
         {
+            var result = false;
             try
             {
-                foreach (var client in GetClientEnumeratorByGroup(group))
+                var clients = GetClientEnumeratorByGroup(group).ToArray();
+                var tasks = new Task[clients.Length];
+                int index = 0;
+                foreach (var client in clients)
                 {
-                    Task.Run(() =>
+                    tasks[index++] = Task.Run(() =>
                     {
                         try
                         {
-                            client.Send(inbox, data);
+                            result |= client.Send(inbox, data);
                         }
                         catch (Exception ex)
                         {
@@ -169,12 +186,13 @@ namespace ZeroLevel.Network
                         }
                     });
                 }
+                Task.WaitAll(tasks);
             }
             catch (Exception ex)
             {
                 Log.SystemError(ex, $"[Exchange.SendBroadcastByGroup] Error broadcast send data to services with type '{group}'. Inbox '{inbox}'");
             }
-            return false;
+            return result;
         }
 
         /// <summary>
@@ -192,48 +210,26 @@ namespace ZeroLevel.Network
 
         public bool Request<Tresponse>(string alias, string inbox, Action<Tresponse> callback)
         {
-            bool success = false;
-            Tresponse response = default(Tresponse);
             try
             {
-                if (false == CallService(alias, (transport) =>
+                return CallService(alias, (transport) =>
                 {
                     try
                     {
-                        using (var waiter = new ManualResetEventSlim(false))
-                        {
-                            if (false == transport.Request<Tresponse>(inbox, resp =>
-                            {
-                                response = resp;
-                                success = true;
-                                waiter.Set();
-                            }).Success)
-                            {
-                                return false;
-                            }
-                            if (false == waiter.Wait(BaseSocket.MAX_REQUEST_TIME_MS))
-                            {
-                                return false;
-                            }
-                        }
-                        return true;
+                        return transport.Request<Tresponse>(inbox, callback);
                     }
                     catch (Exception ex)
                     {
                         Log.SystemError(ex, $"[Exchange.Request] Error request to service '{alias}'. Inbox '{inbox}'");
                     }
                     return false;
-                }))
-                {
-                    Log.SystemWarning($"[Exchange.Request] No responce on request. Service key '{alias}'. Inbox '{inbox}'");
-                }
+                });
             }
             catch (Exception ex)
             {
                 Log.SystemError(ex, $"[Exchange.Request] Error request to service '{alias}'. Inbox '{inbox}'");
             }
-            callback(response);
-            return success;
+            return false;
         }
 
         public bool Request<Trequest, Tresponse>(string alias, Trequest request, Action<Tresponse> callback)
@@ -241,48 +237,26 @@ namespace ZeroLevel.Network
 
         public bool Request<Trequest, Tresponse>(string alias, string inbox, Trequest request, Action<Tresponse> callback)
         {
-            bool success = false;
-            Tresponse response = default(Tresponse);
             try
             {
-                if (false == CallService(alias, (transport) =>
+                return CallService(alias, (transport) =>
                 {
                     try
                     {
-                        using (var waiter = new ManualResetEventSlim(false))
-                        {
-                            if (false == transport.Request<Trequest, Tresponse>(inbox, request, resp =>
-                            {
-                                response = resp;
-                                success = true;
-                                waiter.Set();
-                            }).Success)
-                            {
-                                return false;
-                            }
-                            if (false == waiter.Wait(BaseSocket.MAX_REQUEST_TIME_MS))
-                            {
-                                return false;
-                            }
-                        }
-                        return true;
+                        return transport.Request(inbox, request, callback);
                     }
                     catch (Exception ex)
                     {
                         Log.SystemError(ex, $"[Exchange.Request] Error request to service '{alias}'. Inbox '{inbox}'");
                     }
                     return false;
-                }))
-                {
-                    Log.SystemWarning($"[Exchange.Request] No responce on request. Service key '{alias}'. Inbox '{inbox}'");
-                }
+                });
             }
             catch (Exception ex)
             {
                 Log.SystemError(ex, $"[Exchange.Request] Error request to service '{alias}'. Inbox '{inbox}'");
             }
-            callback(response);
-            return success;
+            return false;
         }
 
         /// <summary>
@@ -535,9 +509,9 @@ namespace ZeroLevel.Network
                                     Log.SystemWarning($"[Exchange.RegisterServicesInDiscovery] Register canceled. {r.Comment}");
                                 }
                             });
-                        if (request.Success == false)
+                        if (request == false)
                         {
-                            Log.SystemWarning($"[Exchange.RegisterServicesInDiscovery] Register canceled.{request.Comment}");
+                            Log.SystemWarning($"[Exchange.RegisterServicesInDiscovery] Register canceled.");
                         }
                     }
                 }
@@ -578,9 +552,9 @@ namespace ZeroLevel.Network
                                 _dicovery_aliases.Rollback();
                             }
                         });
-                        if (!ir.Success)
+                        if (!ir)
                         {
-                            Log.SystemWarning($"[Exchange.UpdateServiceListFromDiscovery] Error request to inbox 'services'. {ir.Comment}");
+                            Log.SystemWarning($"[Exchange.UpdateServiceListFromDiscovery] Error request to inbox 'services'.");
                         }
                     }
                     catch (Exception ex)
@@ -935,7 +909,7 @@ namespace ZeroLevel.Network
                     {
                         try
                         {
-                            if (false == client.Request<Treq, Tresp>(inbox, data, resp => { response.Add(resp); waiter.Signal(); }).Success)
+                            if (false == client.Request<Treq, Tresp>(inbox, data, resp => { response.Add(resp); waiter.Signal(); }))
                             {
                                 waiter.Signal();
                             }
@@ -963,7 +937,7 @@ namespace ZeroLevel.Network
                     {
                         try
                         {
-                            if (false == client.Request<Tresp>(inbox, resp => { response.Add(resp); waiter.Signal(); }).Success)
+                            if (false == client.Request<Tresp>(inbox, resp => { response.Add(resp); waiter.Signal(); }))
                             {
                                 waiter.Signal();
                             }
diff --git a/ZeroLevel/Services/Network/Extensions/ExchangeExtension.cs b/ZeroLevel/Services/Network/Extensions/ExchangeExtension.cs
new file mode 100644
index 0000000..8af73b3
--- /dev/null
+++ b/ZeroLevel/Services/Network/Extensions/ExchangeExtension.cs
@@ -0,0 +1,173 @@
+using System;
+using System.Threading;
+using ZeroLevel.Services.Pools;
+
+namespace ZeroLevel.Network
+{
+    public static class ExchangeExtension
+    {
+        static ObjectPool<AutoResetEvent> _mrePool = new ObjectPool<AutoResetEvent>(() => new AutoResetEvent(false), 16);
+
+        public static Tresponse Request<Tresponse>(this IClientSet exchange, string alias, TimeSpan timeout)
+        {
+            Tresponse response = default;
+            var ev = _mrePool.Allocate();
+            try
+            {
+                if (exchange.Request<Tresponse>(alias, 
+                    _response => { response = _response; ev.Set(); }))
+                {
+                    ev.WaitOne(timeout);
+                }
+            }
+            finally
+            {
+                _mrePool.Free(ev);
+            }
+            return response;
+        }
+
+        public static Tresponse Request<Tresponse>(this IClientSet exchange, string alias, string inbox, TimeSpan timeout)
+        {
+            Tresponse response = default;
+            var ev = _mrePool.Allocate();
+            try
+            {
+                if (exchange.Request<Tresponse>(alias, inbox, 
+                    _response => { 
+                        response = _response; 
+                        ev.Set(); 
+                    }))
+                {
+                    ev.WaitOne(timeout);
+                }
+            }
+            finally
+            {
+                _mrePool.Free(ev);
+            }
+            return response;
+        }
+
+        public static Tresponse Request<Trequest, Tresponse>(this IClientSet exchange, string alias, Trequest request, TimeSpan timeout)
+        {
+            Tresponse response = default;
+            var ev = _mrePool.Allocate();
+            try
+            {
+                if (exchange.Request<Trequest, Tresponse>(alias, request,
+                    _response => { response = _response; ev.Set(); }))
+                {
+                    ev.WaitOne(timeout);
+                }
+            }
+            finally
+            {
+                _mrePool.Free(ev);
+            }
+            return response;
+        }
+
+        public static Tresponse Request<Trequest, Tresponse>(this IClientSet exchange, string alias, string inbox
+            , Trequest request, TimeSpan timeout)
+        { 
+            Tresponse response = default;
+            var ev = _mrePool.Allocate();
+            try
+            {
+                if (exchange.Request<Trequest, Tresponse>(alias, inbox, request, 
+                    _response => { response = _response; ev.Set(); }))
+                {
+                    ev.WaitOne(timeout);
+                }
+            }
+            finally
+            {
+                _mrePool.Free(ev);
+            }
+            return response;
+        }
+
+
+
+        public static Tresponse Request<Tresponse>(this IClientSet exchange, string alias)
+        {
+            Tresponse response = default;
+            var ev = _mrePool.Allocate();
+            try
+            {
+                if (exchange.Request<Tresponse>(alias,
+                    _response => { response = _response; ev.Set(); }))
+                {
+                    ev.WaitOne(Network.BaseSocket.MAX_REQUEST_TIME_MS);
+                }
+            }
+            finally
+            {
+                _mrePool.Free(ev);
+            }
+            return response;
+        }
+
+        public static Tresponse Request<Tresponse>(this IClientSet exchange, string alias, string inbox)
+        {
+            Tresponse response = default;
+            var ev = _mrePool.Allocate();
+            try
+            {
+                if (exchange.Request<Tresponse>(alias, inbox,
+                    _response => {
+                        response = _response;
+                        ev.Set();
+                    }))
+                {
+                    ev.WaitOne(Network.BaseSocket.MAX_REQUEST_TIME_MS);
+                }
+            }
+            finally
+            {
+                _mrePool.Free(ev);
+            }
+            return response;
+        }
+
+        public static Tresponse Request<Trequest, Tresponse>(this IClientSet exchange, string alias, Trequest request)
+        {
+            Tresponse response = default;
+            var ev = _mrePool.Allocate();
+            try
+            {
+                if (exchange.Request<Trequest, Tresponse>(alias, request,
+                    _response => { response = _response; ev.Set(); }))
+                {
+                    ev.WaitOne(Network.BaseSocket.MAX_REQUEST_TIME_MS);
+                }
+            }
+            finally
+            {
+                _mrePool.Free(ev);
+            }
+            return response;
+        }
+
+        public static Tresponse Request<Trequest, Tresponse>(this IClientSet exchange, string alias, string inbox
+            , Trequest request)
+        {
+            Tresponse response = default;
+            var ev = _mrePool.Allocate();
+            try
+            {
+                if (exchange.Request<Trequest, Tresponse>(alias, inbox, request,
+                    _response => { response = _response; ev.Set(); }))
+                {
+                    ev.WaitOne(Network.BaseSocket.MAX_REQUEST_TIME_MS);
+                }
+            }
+            finally
+            {
+                _mrePool.Free(ev);
+            }
+            return response;
+        }
+    }
+}
diff --git a/ZeroLevel/Services/Network/FileTransfer/FileSender.cs b/ZeroLevel/Services/Network/FileTransfer/FileSender.cs
index 466d017..f4c0347 100644
--- a/ZeroLevel/Services/Network/FileTransfer/FileSender.cs
+++ b/ZeroLevel/Services/Network/FileTransfer/FileSender.cs
@@ -96,10 +96,10 @@ namespace ZeroLevel.Network.FileTransfer
                     Send<T>(client, inbox, frame, resendWhenConnectionError, false);
                 }
             });
-            sended = client.Request<T, InvokeResult>(inbox, frame, handle).Success;
+            sended = client.Request<T, InvokeResult>(inbox, frame, handle);
             if (sended == false && resendWhenConnectionError)
             {
-                sended = client.Request<T, InvokeResult>(inbox, frame, handle).Success;
+                sended = client.Request<T, InvokeResult>(inbox, frame, handle);
             }
             return sended;
         }
diff --git a/ZeroLevel/Services/Serialization/MessageSerializer.cs b/ZeroLevel/Services/Serialization/MessageSerializer.cs
index e745368..8669c3f 100644
--- a/ZeroLevel/Services/Serialization/MessageSerializer.cs
+++ b/ZeroLevel/Services/Serialization/MessageSerializer.cs
@@ -169,7 +169,7 @@ namespace ZeroLevel.Services.Serialization
         public static T Copy<T>(T value)
             where T : IBinarySerializable
         {
-            if (default == value) return default;
+            if (null == value) return default;
             using (var writer = new MemoryStreamWriter())
             {
                 value.Serialize(writer);