@using (Ajax.BeginForm(MVC.Admin.DeviceGroup.Create(), 
new AjaxOptions { HttpMethod = "POST", OnSuccess = "saveAjaxForm", OnFailure = "SaveFailure" }))
{
// form content
}

<httpErrors errorMode="Custom">
      <remove statusCode="404"/>
      <error statusCode="404" path="/Error/NotFound" responseMode="ExecuteURL"/>
</httpErrors>

<system.webServer>
    <httpErrors errorMode="DetailedLocalOnly" existingResponse="PassThrough" />

•  Ni Coupling
  
•  Export Coupling
  
•  Overt Coupling
  
•  Covert Coupling
•  Surreptitious Coupling

using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web;
using System.Web.Helpers;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using System.Web.Mvc;
using ActionFilterAttribute = System.Web.Http.Filters.ActionFilterAttribute;

namespace NgxAntiforgeryWebApi.Providers
{
    public class XsrfCookieGeneratorAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
        {
            var xsrfTokenCookie = new HttpCookie("XSRF-TOKEN")
            {
                Value = ComputeXsrfTokenValue(),
                HttpOnly = false // Now JavaScript is able to read the cookie
            };
            HttpContext.Current.Response.AppendCookie(xsrfTokenCookie);
        }

        private string ComputeXsrfTokenValue()
        {
            string cookieToken, formToken;
            AntiForgery.GetTokens(null, out cookieToken, out formToken);
            return $"{cookieToken}:{formToken}";
        }
    }

    public class XsrfTokensValidationAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuting(HttpActionContext actionContext)
        {
            IEnumerable<string> headerValues;
            if (!actionContext.Request.Headers.TryGetValues("X-XSRF-TOKEN", out headerValues))
            {
                actionContext.Response = new HttpResponseMessage(HttpStatusCode.BadRequest) { ReasonPhrase = "X-XSRF-TOKEN header is missing." };
                return;
            }

            if (headerValues == null)
            {
                actionContext.Response = new HttpResponseMessage(HttpStatusCode.BadRequest) { ReasonPhrase = "X-XSRF-TOKEN header value is empty." };
                return;
            }

            var xsrfTokensValue = headerValues.FirstOrDefault();
            if (string.IsNullOrEmpty(xsrfTokensValue) || !xsrfTokensValue.Contains(":"))
            {
                actionContext.Response = new HttpResponseMessage(HttpStatusCode.BadRequest) { ReasonPhrase = "X-XSRF-TOKEN header value is null." };
                return;
            }

            var values = xsrfTokensValue.Split(':');
            if (values.Length != 2)
            {
                actionContext.Response = new HttpResponseMessage(HttpStatusCode.BadRequest) { ReasonPhrase = "X-XSRF-TOKEN header value is malformed." };
                return;
            }

            var cookieToken = values[0];
            var formToken = values[1];

            try
            {
                AntiForgery.Validate(cookieToken, formToken);
            }
            catch (HttpAntiForgeryException ex)
            {
                actionContext.Response = new HttpResponseMessage(HttpStatusCode.BadRequest) {  ReasonPhrase = ex.Message };
            }
        }
    }
}

@model  Project.Models.SpeakerAndNewsViewModel
@{
    ViewBag.Title = "Home Page";
}
@section news
{
@foreach (var item in Model.News)
{
    //..
}
}
@section speakers
{
@foreach (var item in Model.Speakers)
{
    //...
}
}

 
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
 
public class IPBlockModule : IHttpModule
{
       public IPBlockModule()
       {
              // TODO: Add constructor logic here
       }
    public void Dispose()
    {
        //Dispose
    }
 
    public void Init(HttpApplication context)
    {
        context.BeginRequest += new EventHandler(Application_BeginRequest);
    }
 
    private void Application_BeginRequest(object source, EventArgs e)
    {
        HttpContext context = ((HttpApplication)source).Context;
        string ipAddress = context.Request.UserHostAddress;
        if (IsBlockedIpAddress(ipAddress))
        {
            context.Response.StatusCode = 403;
            context.Response.Write("Forbidden : The server understood the request, but It is refusing to fulfill it.");
        }
    }
 
    private bool IsBlockedIpAddress(string ipAddress)
    {
        //Here I have stored Ip addresses in String[]. you can also Store in database.
        string[] IPs = {            "117.196.35.121",
                                    "117.196.35.122",
                                    "117.196.35.123",
                                    "117.196.35.124",
                                    "127.0.0.1"
                       };
 
        foreach(string IP in IPs)
        {
            if(IP == ipAddress)
                return true;
        }
        return false;
   
    }
    
}

 <configuration>
       <system.web>
              <compilation debug="true" targetFramework="4.0"/>
              <httpModules>
                     <add name="IPBlockModule" type="IPBlockModule"/>
              </httpModules>
       </system.web>
</configuration>

Thread.CurrentThread.CurrentUICulture = new CultureInfo("fa-IR");
Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture("fa-IR");

[Required(ErrorMessageResourceName = "ResourceKeyName", ErrorMessageResourceType = typeof(<SolutionName>.Resources.<ResourceClassName>))]

public class LocalizationDisplayNameAttribute : DisplayNameAttribute
  {
    private readonly DisplayAttribute _display;
    public LocalizationDisplayNameAttribute(string resourceName, Type resourceType)
    {
      _display = new DisplayAttribute { ResourceType = resourceType, Name = resourceName };
    }
    public override string DisplayName
    {
      get
      {
        try
        {
          return _display.GetName();
        }
        catch (Exception)
        {
          return _display.Name;
        }
      }
    }
  }

public class LocalizationDisplayNameAttribute : DisplayNameAttribute
{
    private readonly PropertyInfo nameProperty;
    public LocalizationDisplayNameAttribute(string displayNameKey, Type resourceType = null)
        : base(displayNameKey)
    {
        if (resourceType != null)
            nameProperty = resourceType.GetProperty(base.DisplayName, BindingFlags.Static | BindingFlags.Public);
    }
    public override string DisplayName
    {
        get
        {
            if (nameProperty == null) base.DisplayName;
            return (string)nameProperty.GetValue(nameProperty.DeclaringType, null);
        }
    }
}

[LocalizationDisplayName("ResourceKeyName", typeof(<SolutionName>.Resources.<ResourceClassName>))]

public class BaseController : Controller
  {
    private const string LanguageCookieName = "MyLanguageCookieName";
    protected override void ExecuteCore()
    {
      var cookie = HttpContext.Request.Cookies[LanguageCookieName];
      string lang;
      if (cookie != null)
      {
        lang = cookie.Value;
      }
      else
      {
        lang = ConfigurationManager.AppSettings["DefaultCulture"] ?? "fa-IR";
        var httpCookie = new HttpCookie(LanguageCookieName, lang) { Expires = DateTime.Now.AddYears(1) };
        HttpContext.Response.SetCookie(httpCookie);
      }
      Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(lang);
      base.ExecuteCore();
    }
  }

public class LocalizationActionFilterAttribute : ActionFilterAttribute
  {
    private const string LanguageCookieName = "MyLanguageCookieName";
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
      var cookie = filterContext.HttpContext.Request.Cookies[LanguageCookieName];
      string lang;
      if (cookie != null)
      {
        lang = cookie.Value;
      }
      else
      {
        lang = ConfigurationManager.AppSettings["DefaultCulture"] ?? "fa-IR";
        var httpCookie = new HttpCookie(LanguageCookieName, lang) { Expires = DateTime.Now.AddYears(1) };
        filterContext.HttpContext.Response.SetCookie(httpCookie);
      }
      Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(lang);
      base.OnActionExecuting(filterContext);
    }
  }

<select id="langs" onchange="languageChanged()">
  <option value="fa-IR">فارسی</option>
  <option value="en-US">انگلیسی</option>
</select>
<script type="text/javascript">
  function languageChanged() {
    setCookie("MyLanguageCookieName", $('#langs').val(), 365);
    window.location.reload();
  }
  document.ready = function () {
    $('#langs').val(getCookie("MyLanguageCookieName"));
  };
  function setCookie(name, value, exdays, path) {
    var exdate = new Date();
    exdate.setDate(exdate.getDate() + exdays);
    var newValue = escape(value) + ((exdays == null) ? "" : "; expires=" + exdate.toUTCString()) + ((path == null) ? "" : "; path=" + path) ;
    document.cookie = name + "=" + newValue;
  }
  function getCookie(name) {
    var i, x, y, cookies = document.cookie.split(";");
    for (i = 0; i < cookies.length; i++) {
      x = cookies[i].substr(0, cookies[i].indexOf("="));
      y = cookies[i].substr(cookies[i].indexOf("=") + 1);
      x = x.replace(/^\s+|\s+$/g, "");
      if (x == name) {
        return unescape(y);
      }
    }
  }
</script> 

GET https://www.dntips.ir HTTP/1.1
...
Accept-Language: fa-IR,en-US;q=0.5
...

Accept-Language: fa-IR,fa;q=0.8,en-US;q=0.5,ar-BH;q=0.3

<system.web>
    <globalization enableClientBasedCulture="true" uiCulture="auto" culture="auto"></globalization>
</system.web>

var langs = filterContext.HttpContext.Request.UserLanguages;

routes.MapRoute(
    "Localization", // Route name
    "{lang}/{controller}/{action}/{id}", // URL with parameters
    new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
);

public class BaseController : Controller
{
  protected override void ExecuteCore()
  {
    var lang = RouteData.Values["lang"];
    if (lang != null && !string.IsNullOrWhiteSpace(lang.ToString()))
    {
      Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(lang.ToString());
    }
    base.ExecuteCore();
  }
}

public class BaseController : Controller
{
  protected override void OnActionExecuted(ActionExecutedContext context)
  {
    var view = context.Result as ViewResultBase;
    if (view == null) return; // not a view
    var viewName = view.ViewName;
    view.ViewName = GetGlobalizationViewName(viewName, context);
    base.OnActionExecuted(context);
  }
  private static string GetGlobalizationViewName(string viewName, ControllerContext context)
  {
    var cultureName = Thread.CurrentThread.CurrentUICulture.Name;
    if (cultureName == "en-US") return viewName; // default culture
    if (string.IsNullOrEmpty(viewName))
      return context.RouteData.Values["action"] + "." + cultureName; // "Index.fa"
    int i;
    if ((i = viewName.IndexOf('.')) > 0) // ex: Index.cshtml
      return viewName.Substring(0, i + 1) + cultureName + viewName.Substring(i); // "Index.fa.cshtml"
    return viewName + "." + cultureName; // "Index" ==> "Index.fa"
  }
}

public sealed class RazorGlobalizationViewEngine : RazorViewEngine
  {
    protected override IView CreatePartialView(ControllerContext controllerContext, string partialPath)
    {
      return base.CreatePartialView(controllerContext, GetGlobalizationViewPath(controllerContext, partialPath));
    }
    protected override IView CreateView(ControllerContext controllerContext, string viewPath, string masterPath)
    {
      return base.CreateView(controllerContext, GetGlobalizationViewPath(controllerContext, viewPath), masterPath);
    }
    private static string GetGlobalizationViewPath(ControllerContext controllerContext, string viewPath)
    {
      //var controllerName = controllerContext.RouteData.GetRequiredString("controller");
      var request = controllerContext.HttpContext.Request;
      var lang = request.Cookies["MyLanguageCookie"];
      if (lang != null && !string.IsNullOrEmpty(lang.Value) && lang.Value != "en-US")
      {
        var localizedViewPath = Regex.Replace(viewPath, "^~/Views/", string.Format("~/Views/Globalization/{0}/", lang.Value));
        if (File.Exists(request.MapPath(localizedViewPath))) viewPath = localizedViewPath;
      }
      return viewPath;
    }

protected void Application_Start()
{
  ViewEngines.Engines.Clear();
  ViewEngines.Engines.Add(new RazorGlobalizationViewEngine());
}

namespace MvcApplication6.Models
{
    public class Account
    {
        public string Name { get; set; }
        public string Password { get; set; }
    }
}

using System.Web.Mvc;
using MvcApplication6.Models;

namespace MvcApplication6.Controllers
{
    public class LoginController : Controller
    {
        [HttpGet]
        public ActionResult Index()
        {
            return View(); //Shows the login page
        }

        [HttpPost]
        public ActionResult LoginResult()
        {
            string name = Request.Form["name"];
            string password = Request.Form["password"];

            if (name == "Vahid" && password == "123")
                ViewBag.Message = "Succeeded";
            else
                ViewBag.Message = "Failed";

            return View("Result");
        }

        [HttpPost]
        [ActionName("LoginResultWithParams")]
        public ActionResult LoginResult(string name, string password)
        {
            if (name == "Vahid" && password == "123")
                ViewBag.Message = "Succeeded";
            else
                ViewBag.Message = "Failed";

            return View("Result");
        }

        [HttpPost]
        public ActionResult Login(Account account)
        {
            if (account.Name == "Vahid" && account.Password == "123")
                ViewBag.Message = "Succeeded";
            else
                ViewBag.Message = "Failed";

            return View("Result");
        }
    }
}

@model MvcApplication6.Models.Account
@{
    ViewBag.Title = "Index";
}
<h2>
    Login</h2>
@using (Html.BeginForm(actionName: "LoginResult", controllerName: "Login"))
{
    <fieldset>
        <legend>Test LoginResult()</legend>
        <p>
            Name: @Html.TextBoxFor(m => m.Name)</p>
        <p>
            Password: @Html.PasswordFor(m => m.Password)</p>
        <input type="submit" value="Login" />
    </fieldset>
}
@using (Html.BeginForm(actionName: "LoginResultWithParams", controllerName: "Login"))
{
    <fieldset>
        <legend>Test LoginResult(string name, string password)</legend>
        <p>
            Name: @Html.TextBoxFor(m => m.Name)</p>
        <p>
            Password: @Html.PasswordFor(m => m.Password)</p>
        <input type="submit" value="Login" />
    </fieldset>
}
@using (Html.BeginForm(actionName: "Login", controllerName: "Login"))
{
    <fieldset>
        <legend>Test Login(Account acc)</legend>
        <p>
            Name: @Html.TextBoxFor(m => m.Name)</p>
        <p>
            Password: @Html.PasswordFor(m => m.Password)</p>
        <input type="submit" value="Login" />
    </fieldset>
}

@{
    ViewBag.Title = "Result";
}
<fieldset>
    <legend>Login Result</legend>
    <p>
        @ViewBag.Message</p>
</fieldset>

<form action="/Login/LoginResult" method="post">   
    <fieldset>
        <legend>Test LoginResult()</legend>
        <p>
            Name: <input id="Name" name="Name" type="text" value="" /></p>
        <p>
            Password: <input id="Password" name="Password" type="password" /></p>
        <input type="submit" value="Login" />
    </fieldset>
</form>

[AcceptVerbs(HttpVerbs.Get)]

The current request for action 'LoginResult' on controller type 'LoginController' is ambiguous between the following action methods:
System.Web.Mvc.ActionResult LoginResult() on type MvcApplication6.Controllers.LoginController
System.Web.Mvc.ActionResult LoginResult(System.String, System.String) on type MvcApplication6.Controllers.LoginController

public HttpContextBase HttpContext { get; }
public HttpRequestBase Request { get; }
public HttpResponseBase Response { get; }
public RouteData RouteData { get; }

public virtual NameValueCollection QueryString { get; } // GET variables
public NameValueCollection Form { get; } // POST variables
public HttpCookieCollection Cookies { get; }
public NameValueCollection Headers { get; }
public string HttpMethod { get; }

Request.Form
Request.QueryString
Request.Files
RouteData.Values

[HttpPost]
[ActionName("LoginResultWithFormCollection")]
public ActionResult LoginResult(FormCollection collection)
{
       string name = collection["name"];
       string password = collection["password"];

       if (name == "Vahid" && password == "123")
                ViewBag.Message = "Succeeded";
       else
                ViewBag.Message = "Failed";

       return View("Result");
}

[HttpPost]
public ActionResult LoginResultUpdateFormCollection(FormCollection collection)
{
       var account = new Account();
       this.UpdateModel(account, collection.ToValueProvider());

       if (account.Name == "Vahid" && account.Password == "123")
                ViewBag.Message = "Succeeded";
       else
                ViewBag.Message = "Failed";

       return View("Result");
}

[HttpPost]
public ActionResult LoginResultUpdateModel()
{
       var account = new Account();
        this.UpdateModel(account);

        if (account.Name == "Vahid" && account.Password == "123")
                ViewBag.Message = "Succeeded";
        else
                ViewBag.Message = "Failed";

        return View("Result");
}