public interface IValidationDictionary
{
    void AddError(string key, string message);
    bool IsValid { get; }
}

public class ModelStateWrapper : IValidationDictionary
{
    private ModelStateDictionary _modelState;

    public ModelStateWrapper(ModelStateDictionary modelState)
    {
        _modelState = modelState;
    }

    public void AddError(string key, string errorMessage)
    {
        _modelState.AddModelError(key, errorMessage);
    }

    public bool IsValid
    {
        get { return _modelState.IsValid; }
    }
}

public interface IApplicationService
{
    void Initialize(IValidationDictionary validationDictionary);
}

public interface IUserService : IApplicationService
{
    Task CreateAsync(UserCreateModel model);
}

public class UserService : IUserService
{
    private readonly IUnitOfWork _uow;
    private IValidationDictionary _validationDictionary;

    public UserService(IUnitOfWork uow)
    {
        _uow = uow ?? throw new ArgumentNullException(nameof(uow));
    }

    public void Initialize(IValidationDictionary validationDictionary)
    {
        _validationDictionary = validationDictionary ?? throw new ArgumentNullException(nameof(validationDictionary));
    }

    public Task CreateAsync(UserCreateModel model)
    {
        //todo: logic for create new user

        if (condition)
            _validationDictionary.AddError(string.Empty, "پیغامی که قرار است برای کاربرنهایی قابل مشاهده باشد");

        if (other condition)
            _validationDictionary.AddError(string.Empty, "پیغامی که قرار است برای کاربرنهایی قابل مشاهده باشد");
    }
}

using System;
using System.Diagnostics;
using Microsoft.Office.Tools.Word;
using Action = Microsoft.Office.Tools.Word.Action;

       private SmartTag _st;
       private void init()
       {
           try
           {
               //Enable Smart Tags in Word
               if (!Application.Options.LabelSmartTags)
               {
                   //ممکن است اسمارت تگ‌ها در ورد غیرفعال باشند. به این صورت می‌شود آنها را فعال کرد
                   Application.Options.LabelSmartTags = true;
               }

               _st = new SmartTag(@"www.microsoft.com/Demo#FarsiSmartTag", @"فارسی به پارسی");

               //دریافت واژه‌های فارسی از دیتابیس و افزودن خودکار آنها به اسمارت تگ‌ها
               if (!DBhelper.AddSmartTagItems(_st, "select distinct farsi from tblFarsiToParsi")) return;

               Action stActions = new Action("تبدیل");//تعریف یک اکشن جدید
               stActions.Click += stActions_Click;//انتساب روال‌های رخداد گردان
               stActions.BeforeCaptionShow += stActions_BeforeCaptionShow;
               _st.Actions = new[] { stActions };
               VstoSmartTags.Add(_st);//افزودن اسمارت تگ به مجموعه
           }
           catch (Exception ex)
           {
               EventLog.WriteEntry("FarsiToParsi", ex.ToString(), EventLogEntryType.Error, 7);
           }
       }

       private void ThisAddIn_Startup(object sender, EventArgs e)
       {
           init();
       }

       static void stActions_BeforeCaptionShow(object sender, ActionEventArgs e)
       {
           try
           {
               Action clickedAction = sender as Action;
               if (clickedAction != null)
               {
                   string parsi = DBhelper.FindParsi(e.Text);//معادل پارسی از دیتابیس دریافت می‌شود
                   clickedAction.Caption = (parsi == string.Empty ? e.Text : parsi);
               }
           }
           catch (Exception ex)
           {
               EventLog.WriteEntry("FarsiToParsi", ex.ToString(), EventLogEntryType.Error, 7);
           }
       }

       static void stActions_Click(object sender, ActionEventArgs e)
       {
           try
           {
               Action clickedAction = sender as Action;
               if (clickedAction != null)
               {
                   e.Range.Text = clickedAction.Caption;//جایگزینی متن موجود با عنوانی که پیشتر پارسی شده است
               }
           }
           catch (Exception ex)
           {
               EventLog.WriteEntry("FarsiToParsi", ex.ToString(), EventLogEntryType.Error, 7);
           }
       }

using System;
using System.Data.SQLite;
using System.Diagnostics;
using System.Reflection;
using Microsoft.Office.Tools.Word;

namespace Farsi2Parsi
{
   class DBhelper
   {
       #region Methods (2)

       // Public Methods (2)

       public static bool AddSmartTagItems(SmartTag st, string strSQL)
       {
           SQLiteDataReader myReader = null;
           SQLiteCommand sqlCmd = null;
           bool ret = false;
           try
           {
               SQLiteConnection sqlCon = new SQLiteConnection
               {
                   ConnectionString = "Data Source=" + ConStr.ConnectionString
               };
               sqlCon.Open();
               sqlCmd = new SQLiteCommand(strSQL, sqlCon);
               myReader = sqlCmd.ExecuteReader();

               if (myReader != null)
                   while (myReader.Read())
                   {
                       if (myReader.GetValue(0) != DBNull.Value)
                           st.Terms.Add(myReader.GetValue(0).ToString());
                   }

               ret = true;
           }
           catch (Exception ex)
           {
               EventLog.WriteEntry("FarsiToParsi", ex + "\n" + Environment.CurrentDirectory + "\n" +
               Assembly.GetExecutingAssembly().Location, EventLogEntryType.Error, 7);
           }
           finally
           {
               if (myReader != null)
                   myReader.Close();

               if (sqlCmd != null)
                   sqlCmd.Connection.Close();
           }
           return ret;
       }

       public static string FindParsi(string farsi)
       {
           SQLiteDataReader myReader = null;
           SQLiteCommand sqlCmd = null;
           string ret = string.Empty;
           string strSQL = "select parsi from tblFarsiToParsi where farsi='" + farsi.Replace("'", "''") + "'";
           try
           {
               SQLiteConnection sqlCon = new SQLiteConnection
               {
                   ConnectionString = "Data Source=" + ConStr.ConnectionString
               };
               sqlCon.Open();
               sqlCmd = new SQLiteCommand(strSQL, sqlCon);
               myReader = sqlCmd.ExecuteReader();

               if (myReader != null)
               {
                   myReader.Read(); //اولین مورد کافی است
                   if (myReader.GetValue(0) != DBNull.Value)
                       ret = myReader.GetValue(0).ToString();
               }
           }
           catch (Exception ex)
           {
               EventLog.WriteEntry("FarsiToParsi", ex + "\n" + Environment.CurrentDirectory + "\n" +
               Assembly.GetExecutingAssembly().Location, EventLogEntryType.Error, 8);
           }
           finally
           {
               if (myReader != null)
                   myReader.Close();

               if (sqlCmd != null)
                   sqlCmd.Connection.Close();
           }
           return ret;
       }
       #endregion Methods
   }
}

   class ConStr
   {
       public static string ConnectionString
       {
           get
           {
               return Microsoft.Win32.Registry.LocalMachine.OpenSubKey("SOFTWARE\\FarsiToParsi").GetValue("folder") + "\\ErrorsBank.sqlite";
           }
       }
   }

//SecurityMdl.cs
using System;
using System.Web;

namespace SecurityMdl
{
   public class SecurityMdl : IHttpModule
   {
       public void Init(HttpApplication app)
       {
           app.PreSendRequestHeaders += app_PreSendRequestHeaders;
       }

       static void app_PreSendRequestHeaders(object sender, EventArgs e)
       {
           CRemoveHeader.CheckPreSendRequestHeaders(sender);
       }

       public void Dispose() { }
   }
}

//CRemoveHeader.cs
using System;
using System.Collections.Generic;
using System.Web;

namespace SecurityMdl
{
   class CRemoveHeader
   {
       private static readonly List<string> _headersToRemoveCache
           = new List<string>
                             {
                                 "X-AspNet-Version",
                                 "X-AspNetMvc-Version",
                                 "Server"
                             };

       public static void CheckPreSendRequestHeaders(Object sender)
       {
           //capture the current request
           var currentResponse = ((HttpApplication)sender).Response;
          
           //removing headers
           //it only works with IIS 7.x's integrated pipeline
           _headersToRemoveCache.ForEach(h => currentResponse.Headers.Remove(h));

           //modify the "Server" Http Header
           currentResponse.Headers.Set("Server", "Test");
       }
   }
}

<system.webServer>
<modules>
  <add name="SecurityMdl" type="SecurityMdl.SecurityMdl, SecurityMdl"/>
</modules>

<system.webServer>
<httpProtocol>
  <customHeaders>
    <remove name="X-Powered-By"/>
  </customHeaders>
</httpProtocol>

public class Currency
{
  private string _currencyName;
  private string _countryName;

  public string CurrencyName
  {
     get { return _currencyName; }
  }

  public string CountryName
  {
     get { return _countryName; }
  }
}

  private string _currencyName;
  private string _countryName;
  public Currency(string paramCurrencyName,string paramCountryName)
  {
     _currencyName= paramCurrencyName;
     _countryName = paramCountryName;
  }

  public void DoSomthing()
  {
     _countryName = "somthing else";
  }

 public class Currency
{
  private readonly string _currencyName;
  private readonly string _countryName;
  public string CurrencyName
  {
    get { return _currencyName; }
  }

  public string CountryName
  {
    get { return _countryName; }
  }
  public Currency(string paramCurrencyName,string paramCountryName)
  {
     _currencyName= paramCurrencyName;
     _countryName = paramCountryName;
  }
}

public class Startup
    {
        public void Configuration( IAppBuilder appBuilder )
        {     
            var config = new HttpConfiguration();
                 
            var routeHandler = HttpClientFactory.CreatePipeline( new HttpControllerDispatcher( config ), new DelegatingHandler[] 
            {
                new MyHandler(),
            } );
      
            config.Routes.MapHttpRoute(
                name: "Default",
                routeTemplate: "{controller}/{action}",
                defaults: null,
                constraints: null,
                handler: routeHandler
            );            
           
            config.EnsureInitialized();
         
            appBuilder.UseWebApi( config );         
        }
    }

<!DOCTYPE html>
<html>
<head>
    <title>@ViewBag.Title</title>
    <link href="@Url.Content("~/Content/Site.css")" rel="stylesheet" type="text/css" />
    <script src="@Url.Content("~/Scripts/jquery-1.5.1.min.js")" type="text/javascript"></script>
</head>

<body>
    @RenderBody()
</body>
</html>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="shortcut icon" href="@Url.Content("~/favicon.ico")" type="image/x-icon" />

@{
    Layout = "~/Views/Shared/_Layout.cshtml";
}

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Index</h2>

<!DOCTYPE html>
<html>
<head>
    <title>@ViewBag.Title</title>
    <link href="@Url.Content("~/Content/Site.css")" rel="stylesheet" type="text/css" />
    <script src="@Url.Content("~/Scripts/jquery-1.5.1.min.js")" type="text/javascript"></script>
</head>
<body>
    <div id="menu">
        @if (IsSectionDefined("Menu"))
        {
            RenderSection("Menu", required: false);
        }
        else
        { 
            <span>This is the default ...!</span>   
        }
    </div>
    <div id="body">
        @RenderBody()
    </div>
</body>
</html>

@{
    ViewBag.Title = "Index";
    //Layout = null;
    Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>
    Index</h2>
@section Menu{
    <ul>
        <li>item 1</li>
        <li>item 2</li>
    </ul>
}

@section JavaScript
{
   <script type="text/javascript" src="@Url.Content("~/Scripts/SomeScript.js")" />;
   <script type="text/javascript" src="@Url.Content("~/Scripts/AnotherScript.js")" />;
}

@RenderSection("JavaScript", required: false)

using System.Web.Mvc;

namespace MvcApplication11.Areas.Reporting
{
    public class ReportingAreaRegistration : AreaRegistration
    {
        public override string AreaName
        {
            get
            {
                return "Reporting";
            }
        }

        public override void RegisterArea(AreaRegistrationContext context)
        {
            context.MapRoute(
                "Reporting_default",
                "Reporting/{controller}/{action}/{id}",
                new { action = "Index", id = UrlParameter.Optional }
            );
        }
    }
}

Multiple types were found that match the controller named 'Home'. This can happen if the route that services this
request ('{controller}/{action}/{id}') does not specify namespaces to search for a controller that matches the request.
If this is the case, register this route by calling an overload of the 'MapRoute' method that takes a 'namespaces' parameter.

The request for 'Home' has found the following matching controllers:
MvcApplication11.Areas.Admin.Controllers.HomeController
MvcApplication11.Controllers.HomeController 

public static void RegisterRoutes(RouteCollection routes)
{
     routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

     routes.MapRoute(
                "Default", // Route name
                "{controller}/{action}/{id}", // URL with parameters
                new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
                , namespaces: new[] { "MvcApplication11.Controllers" }
            );
}

@Html.ActionLink(linkText: "Home", actionName: "Index", controllerName: "Home")

@Html.ActionLink(linkText: "Home", actionName: "Index", controllerName: "Home",
                 routeValues: new { Area = "Admin" } , htmlAttributes: null)

public ActionResult Index()
{
    return RedirectToAction("Index", "Home", new { Area = "Admin" });
}