diff --git a/CancellationDisposable.cs b/CancellationDisposable.cs
deleted file mode 100644
index 700a2c2..0000000
--- a/CancellationDisposable.cs
+++ /dev/null
@@ -1,38 +0,0 @@
-using System;
-using System.Threading;
-
-namespace Rehau.Sku.Assist
-{
-    sealed class CancellationDisposable : IDisposable
-    {
-
-        readonly CancellationTokenSource cts;
-        public CancellationDisposable(CancellationTokenSource cts)
-        {
-            if (cts == null)
-            {
-                throw new ArgumentNullException("cts");
-            }
-
-            this.cts = cts;
-        }
-
-        public CancellationDisposable()
-            : this(new CancellationTokenSource())
-        {
-        }
-
-        public CancellationToken Token
-        {
-            get { return cts.Token; }
-        }
-
-        public void Dispose()
-        {
-            cts.Cancel();
-        }
-    }
-
-}
-
-
diff --git a/DefaultDisposable.cs b/DefaultDisposable.cs
deleted file mode 100644
index f991181..0000000
--- a/DefaultDisposable.cs
+++ /dev/null
@@ -1,21 +0,0 @@
-using System;
-
-namespace Rehau.Sku.Assist
-{
-    sealed class DefaultDisposable : IDisposable
-    {
-
-        public static readonly DefaultDisposable Instance = new DefaultDisposable();
-
-        DefaultDisposable()
-        {
-        }
-
-        public void Dispose()
-        {
-        }
-    }
-
-}
-
-
diff --git a/ExcelTaskUtil.cs b/ExcelTaskUtil.cs
deleted file mode 100644
index c7d1b94..0000000
--- a/ExcelTaskUtil.cs
+++ /dev/null
@@ -1,133 +0,0 @@
-using ExcelDna.Integration;
-using System.Threading.Tasks;
-using System;
-using System.Threading;
-
-namespace Rehau.Sku.Assist
-{
-    internal static class ExcelTaskUtil
-    {
-        public static object Run<TResult>(string callerFunctionName, object callerParameters, Func<CancellationToken, Task<TResult>> taskSource)
-        {
-            return ExcelAsyncUtil.Observe(callerFunctionName, callerParameters, delegate
-            {
-                var cts = new CancellationTokenSource();
-                var task = taskSource(cts.Token);
-                return new ExcelTaskObservable<TResult>(task, cts);
-            });
-        }
-
-        public static object Run<TResult>(string callerFunctionName, object callerParameters, Func<Task<TResult>> taskSource)
-        {
-            return ExcelAsyncUtil.Observe(callerFunctionName, callerParameters, delegate
-            {
-                var task = taskSource();
-                return new ExcelTaskObservable<TResult>(task);
-            });
-        }
-
-        class ExcelTaskObservable<TResult> : IExcelObservable
-        {
-            readonly Task<TResult> _task;
-            readonly CancellationTokenSource _cts;
-            public ExcelTaskObservable(Task<TResult> task)
-            {
-                _task = task;
-            }
-
-            public ExcelTaskObservable(Task<TResult> task, CancellationTokenSource cts)
-                : this(task)
-            {
-                _cts = cts;
-            }
-
-            public IDisposable Subscribe(IExcelObserver observer)
-            {
-                switch (_task.Status)
-                {
-                    case TaskStatus.RanToCompletion:
-                        observer.OnNext(_task.Result);
-                        observer.OnCompleted();
-                        break;
-                    case TaskStatus.Faulted:
-                        observer.OnError(_task.Exception.InnerException);
-                        break;
-                    case TaskStatus.Canceled:
-                        observer.OnError(new TaskCanceledException(_task));
-                        break;
-                    default:
-                        _task.ContinueWith(t =>
-                        {
-                            switch (t.Status)
-                            {
-                                case TaskStatus.RanToCompletion:
-                                    observer.OnNext(t.Result);
-                                    observer.OnCompleted();
-                                    break;
-                                case TaskStatus.Faulted:
-                                    observer.OnError(t.Exception.InnerException);
-                                    break;
-                                case TaskStatus.Canceled:
-                                    observer.OnError(new TaskCanceledException(t));
-                                    break;
-                            }
-                        });
-                        break;
-                }
-
-                if (_cts != null)
-                {
-                    return new CancellationDisposable(_cts);
-                }
-
-                return DefaultDisposable.Instance;
-            }
-        }
-
-        sealed class DefaultDisposable : IDisposable
-        {
-
-            public static readonly DefaultDisposable Instance = new DefaultDisposable();
-
-            DefaultDisposable()
-            {
-            }
-
-            public void Dispose()
-            {
-            }
-        }
-
-        sealed class CancellationDisposable : IDisposable
-        {
-
-            readonly CancellationTokenSource cts;
-            public CancellationDisposable(CancellationTokenSource cts)
-            {
-                if (cts == null)
-                {
-                    throw new ArgumentNullException("cts");
-                }
-
-                this.cts = cts;
-            }
-
-            public CancellationDisposable()
-                : this(new CancellationTokenSource())
-            {
-            }
-
-            public CancellationToken Token
-            {
-                get { return cts.Token; }
-            }
-
-            public void Dispose()
-            {
-                cts.Cancel();
-            }
-        }
-
-    }
-}
-
diff --git a/Functions.cs b/Functions.cs
deleted file mode 100644
index 999a942..0000000
--- a/Functions.cs
+++ /dev/null
@@ -1,24 +0,0 @@
-using ExcelDna.Integration;
-
-namespace Rehau.Sku.Assist
-{
-    public class Functions : IExcelAddIn
-    {
-        [ExcelFunction(description: "Получение наименования и артикула позиции")]
-        public static string RAUNAME(string request)
-        {
-            SkuAssist.EnsureHttpInitialized();
-            return SkuAssist.GetSku(request);
-        }
-
-        public void AutoClose()
-        {
-            ExcelIntegration.RegisterUnhandledExceptionHandler(
-                delegate (object ex) { return string.Format("!!!ERROR: {0}", ex.ToString()); });
-        }
-
-        public void AutoOpen()
-        {
-        }
-    }
-}
\ No newline at end of file
diff --git a/README.md b/README.md
index 77f4586..8fe94af 100644
--- a/README.md
+++ b/README.md
@@ -20,9 +20,9 @@
 -----
 
 ### Ограничения прототипа
-1. Не реализована многопоточность выполнения метода формулы RAUNAME. Не рекомендуется попытка выполнения большого числа запросов одновременно.
+1. ~~Не реализована многопоточность выполнения метода формулы RAUNAME. Не рекомендуется попытка выполнения большого числа запросов одновременно.~~
 2. Относительно невысокая скорость работы из-за отсутствия поискового API сайта магазина.
-3. Из-за особенностей реализации интернет-магазина приходится фильтровать часть результатов выдачи, что может сказываться на качестве распознавания запроса.
+3. ~~Из-за особенностей реализации интернет-магазина приходится фильтровать часть результатов выдачи, что может сказываться на качестве распознавания запроса.~~
 
 ## Установка
 1. Скачать архив *Rehau.Sku.Assist.zip* по ссылке https://github.com/schebotar/Rehau.Sku.Assist/releases/tag/v0.1.0-alpha
diff --git a/Rehau.Sku.Assist-AddIn-packed.xll b/Rehau.Sku.Assist-AddIn-packed.xll
new file mode 100644
index 0000000..aea355f
Binary files /dev/null and b/Rehau.Sku.Assist-AddIn-packed.xll differ
diff --git a/Rehau.Sku.Assist-AddIn.dna b/Rehau.Sku.Assist-AddIn.dna
index b7322e9..bdf8847 100644
--- a/Rehau.Sku.Assist-AddIn.dna
+++ b/Rehau.Sku.Assist-AddIn.dna
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <DnaLibrary Name="Rehau.Sku.Assist Add-In" RuntimeVersion="v4.0" xmlns="http://schemas.excel-dna.net/addin/2020/07/dnalibrary">
-  <ExternalLibrary Path="Rehau.Sku.Assist.dll" ExplicitExports="false" LoadFromBytes="true" Pack="true" IncludePdb="false" />
+  <ExternalLibrary Path="Rehau.Sku.Assist.dll" ExplicitRegistration="true" LoadFromBytes="true" Pack="true" IncludePdb="false" />
 
   <!--
        The RuntimeVersion attribute above allows only the following setting:
diff --git a/Rehau.Sku.Assist.csproj b/Rehau.Sku.Assist.csproj
index 37744c7..5b7438a 100644
--- a/Rehau.Sku.Assist.csproj
+++ b/Rehau.Sku.Assist.csproj
@@ -14,6 +14,7 @@
     <Deterministic>true</Deterministic>
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
+    <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -35,37 +36,59 @@
   <ItemGroup>
     <Reference Include="AngleSharp, Version=0.16.1.0, Culture=neutral, PublicKeyToken=e83494dcdc6d31ea, processorArchitecture=MSIL">
       <HintPath>packages\AngleSharp.0.16.1\lib\net472\AngleSharp.dll</HintPath>
+      <Private>True</Private>
     </Reference>
     <Reference Include="ExcelDna.Integration, Version=1.1.0.0, Culture=neutral, PublicKeyToken=f225e9659857edbe, processorArchitecture=MSIL">
       <HintPath>packages\ExcelDna.Integration.1.5.0\lib\net452\ExcelDna.Integration.dll</HintPath>
+      <Private>False</Private>
+    </Reference>
+    <Reference Include="ExcelDna.Registration, Version=1.1.0.0, Culture=neutral, PublicKeyToken=f225e9659857edbe, processorArchitecture=MSIL">
+      <HintPath>packages\ExcelDna.Registration.1.5.0\lib\net452\ExcelDna.Registration.dll</HintPath>
+      <Private>True</Private>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Buffers, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
       <HintPath>packages\System.Buffers.4.5.1\lib\net461\System.Buffers.dll</HintPath>
     </Reference>
+    <Reference Include="System.Configuration" />
     <Reference Include="System.Core" />
-    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>packages\System.Runtime.CompilerServices.Unsafe.5.0.0\lib\net45\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    <Reference Include="System.Data.OracleClient" />
+    <Reference Include="System.Memory, Version=4.0.1.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Memory.4.5.4\lib\net461\System.Memory.dll</HintPath>
     </Reference>
-    <Reference Include="System.Text.Encoding.CodePages, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>packages\System.Text.Encoding.CodePages.5.0.0\lib\net461\System.Text.Encoding.CodePages.dll</HintPath>
+    <Reference Include="System.Net" />
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Numerics.Vectors.4.5.0\lib\net46\System.Numerics.Vectors.dll</HintPath>
     </Reference>
+    <Reference Include="System.Runtime.Caching" />
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Runtime.CompilerServices.Unsafe.6.0.0\lib\net461\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Security" />
+    <Reference Include="System.ServiceProcess" />
+    <Reference Include="System.Text.Encoding.CodePages, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Text.Encoding.CodePages.6.0.0\lib\net461\System.Text.Encoding.CodePages.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Transactions" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Xml" />
+    <Reference Include="WindowsBase" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="CancellationDisposable.cs" />
-    <Compile Include="DefaultDisposable.cs" />
-    <Compile Include="ExcelTaskUtil.cs" />
-    <Compile Include="Functions.cs" />
+    <Compile Include="src\ExcelDNA\AddIn.cs" />
+    <Compile Include="src\Assistant\IProduct.cs" />
+    <Compile Include="src\Assistant\Product.cs" />
+    <Compile Include="src\ExcelDNA\Functions.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
-    <Compile Include="SkuAssist.cs" />
+    <Compile Include="src\Assistant\SkuAssist.cs" />
   </ItemGroup>
   <ItemGroup>
+    <None Include="app.config" />
     <None Include="Rehau.Sku.Assist-AddIn.dna" />
     <None Include="packages.config" />
     <None Include="Properties\ExcelDna.Build.props" />
diff --git a/SkuAssist.cs b/SkuAssist.cs
deleted file mode 100644
index b873104..0000000
--- a/SkuAssist.cs
+++ /dev/null
@@ -1,56 +0,0 @@
-using System.Net.Http;
-using System.Threading.Tasks;
-using AngleSharp;
-using System.Linq;
-using System.Net;
-
-namespace Rehau.Sku.Assist
-{
-    static class SkuAssist
-    {
-        static private HttpClient _httpClient;
-
-        public static void EnsureHttpInitialized()
-        {
-            if (_httpClient == null)
-            {
-                _httpClient = new HttpClient();
-            }
-        }
-
-        public static string GetSku(string request)
-        {
-            string url = "https://shop-rehau.ru/catalogsearch/result/?q=" + request;
-            HttpResponseMessage response = GetResponse(url).Result;
-            var document = GetDocument(response).Result;
-
-            var name = document
-                .All
-                .Where(e => e.ClassName == "product-item__desc-top")
-                .Select(e => new { sku = e.Children[0].TextContent, name = e.Children[1].TextContent.Trim(new[] { '\n', ' ' }) })
-                .Where(t => !t.sku.Any(c => char.IsLetter(c)))
-                .FirstOrDefault();
-
-            return name == null ? "Не найдено" : $"{name.name} ({name.sku})";
-        }
-
-        private static async Task<HttpResponseMessage> GetResponse(string url)
-        {
-            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
-            HttpResponseMessage response = await _httpClient.GetAsync(url);
-            response.EnsureSuccessStatusCode();
-            return response;
-        }
-
-        private static async Task<AngleSharp.Dom.IDocument> GetDocument(HttpResponseMessage response)
-        {
-            IConfiguration config = Configuration.Default;
-            IBrowsingContext context = BrowsingContext.New(config);
-
-            string source = await response.Content.ReadAsStringAsync();
-            return await context.OpenAsync(req => req.Content(source));
-        }
-    }
-}
-
-
diff --git a/app.config b/app.config
new file mode 100644
index 0000000..3f5b7b7
--- /dev/null
+++ b/app.config
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Text.Encoding.CodePages" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" /></startup></configuration>
diff --git a/packages.config b/packages.config
index 07a90ac..cc383d8 100644
--- a/packages.config
+++ b/packages.config
@@ -1,9 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="AngleSharp" version="0.16.1" targetFramework="net48" />
-  <package id="ExcelDna.AddIn" version="1.5.0" targetFramework="net48" />
-  <package id="ExcelDna.Integration" version="1.5.0" targetFramework="net48" />
+  <package id="ExcelDna.AddIn" version="1.5.0" targetFramework="net480" />
+  <package id="ExcelDna.Integration" version="1.5.0" targetFramework="net480" />
+  <package id="ExcelDna.Registration" version="1.5.0" targetFramework="net480" />
   <package id="System.Buffers" version="4.5.1" targetFramework="net48" />
-  <package id="System.Runtime.CompilerServices.Unsafe" version="5.0.0" targetFramework="net48" />
-  <package id="System.Text.Encoding.CodePages" version="5.0.0" targetFramework="net48" />
+  <package id="System.Memory" version="4.5.4" targetFramework="net48" />
+  <package id="System.Numerics.Vectors" version="4.5.0" targetFramework="net48" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="6.0.0" targetFramework="net48" />
+  <package id="System.Text.Encoding.CodePages" version="6.0.0" targetFramework="net48" />
 </packages>
\ No newline at end of file
diff --git a/src/Assistant/IProduct.cs b/src/Assistant/IProduct.cs
new file mode 100644
index 0000000..aca3ff5
--- /dev/null
+++ b/src/Assistant/IProduct.cs
@@ -0,0 +1,9 @@
+namespace Rehau.Sku.Assist
+{
+    interface IProduct
+    {
+        string Sku { get; }
+        string Name { get; }
+        string Uri { get; }
+    }
+}
diff --git a/src/Assistant/Product.cs b/src/Assistant/Product.cs
new file mode 100644
index 0000000..17a7065
--- /dev/null
+++ b/src/Assistant/Product.cs
@@ -0,0 +1,21 @@
+namespace Rehau.Sku.Assist
+{
+    public class Product : IProduct
+    {
+        public string Sku { get; }
+        public string Name { get; }
+
+        public string Uri => throw new System.NotImplementedException();
+
+        public Product(string sku, string name)
+        {
+            Sku = sku;
+            Name = name;
+        }
+
+        public override string ToString()
+        {
+            return $"{this.Name} ({this.Sku})";
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Assistant/SkuAssist.cs b/src/Assistant/SkuAssist.cs
new file mode 100644
index 0000000..dc36dc0
--- /dev/null
+++ b/src/Assistant/SkuAssist.cs
@@ -0,0 +1,45 @@
+using AngleSharp;
+using AngleSharp.Dom;
+using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+
+namespace Rehau.Sku.Assist
+{
+    static class SkuAssist
+    {
+        public async static Task<string> GetContent(string request, HttpClient httpClient)
+        {
+            string uri = "https://shop-rehau.ru/catalogsearch/result/?q=" + request._CleanRequest();
+            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
+
+            return await httpClient.GetStringAsync(uri);
+        }
+
+        public async static Task<IDocument> GetDocument(Task<string> source)
+        {
+            IConfiguration config = Configuration.Default;
+            IBrowsingContext context = BrowsingContext.New(config);
+
+            return await context.OpenAsync(req => req.Content(source.Result));
+        }
+
+        public static IProduct GetProductFromDocument(IDocument document)
+        {
+            return document
+                .All
+                .Where(e => e.ClassName == "product-item__desc-top")
+                .Select(e => new Product(e.Children[0].TextContent, e.Children[1].TextContent.Trim(new[] { '\n', ' ' })))
+                .FirstOrDefault();
+        }
+
+        private static string _CleanRequest(this string input)
+        {
+            return input.Replace("+", " plus ");
+        }
+    }
+}
+
+
diff --git a/src/ExcelDNA/AddIn.cs b/src/ExcelDNA/AddIn.cs
new file mode 100644
index 0000000..dd99667
--- /dev/null
+++ b/src/ExcelDNA/AddIn.cs
@@ -0,0 +1,24 @@
+using ExcelDna.Integration;
+using ExcelDna.Registration;
+
+namespace Rehau.Sku.Assist
+{
+    public class AddIn : IExcelAddIn
+    {
+        public void AutoOpen()
+        {
+            RegisterFunctions();
+        }
+
+        public void AutoClose()
+        {
+        }
+
+        void RegisterFunctions()
+        {
+            ExcelRegistration.GetExcelFunctions()
+                             .ProcessAsyncRegistrations(nativeAsyncIfAvailable: false)
+                             .RegisterFunctions();
+        }
+    }
+}
diff --git a/src/ExcelDNA/Functions.cs b/src/ExcelDNA/Functions.cs
new file mode 100644
index 0000000..ec9c607
--- /dev/null
+++ b/src/ExcelDNA/Functions.cs
@@ -0,0 +1,21 @@
+using AngleSharp.Dom;
+using ExcelDna.Integration;
+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace Rehau.Sku.Assist
+{
+    public class Functions
+    {
+        private static HttpClient _httpClient = new HttpClient();
+
+        [ExcelFunction]
+        public static async Task<string> RAUNAME(string request)
+        {
+            Task<string> contentTask = Task.Run(() => SkuAssist.GetContent(request, _httpClient));
+            Task<IDocument> documentTask = await contentTask.ContinueWith(content => SkuAssist.GetDocument(content));
+            IProduct product = await documentTask.ContinueWith(doc => SkuAssist.GetProductFromDocument(doc.Result));
+            return product == null ? ExcelError.ExcelErrorNull.ToString() : product.ToString();
+        }
+    }
+}
\ No newline at end of file