Models/LoginModel.cs
public class LoginModel
{
    public string Username { get; set; }
    public string Password { get; set; }
}
Controllers/LoginController.cs
using System.Collections.Generic;
using System.Web.Mvc;
using YourProjectName.Models;

public class LoginController : Controller
{
    // Simulated users
    private static List<User> users = new List<User>
    {
        new User { Username = "admin", Password = "admin123", Role = "Admin" },
        new User { Username = "john", Password = "john123", Role = "Customer" }
    };

    public ActionResult Index()
    {
        return View();
    }

    [HttpPost]
    public ActionResult Index(LoginModel model)
    {
        var user = users.Find(u => u.Username == model.Username && u.Password == model.Password);
        if (user != null)
        {
            Session["User"] = user.Username;
            Session["Role"] = user.Role;
            return RedirectToAction("Dashboard");
        }
        ViewBag.Message = "Invalid credentials";
        return View();
    }
    public ActionResult Dashboard()
    {
        if (Session["User"] == null)
            return RedirectToAction("Index");

        ViewBag.Role = Session["Role"];
        return View();
    }
    public ActionResult Logout()
    {
        Session.Clear();
        return RedirectToAction("Index");
    }
}
Views/Login/Index.cshtml
@model NetBankingLoginPortal.Models.LoginModel
@{
    ViewBag.Title = "Net Banking Login";
}
<div class="container mt-5">
    <h2 class="text-center">Net Banking Login</h2>
    @using (Html.BeginForm())
    {
        <div class="form-group">
            @Html.LabelFor(m => m.Username)
            @Html.TextBoxFor(m => m.Username, new { @class = "form-control" })
        </div>
        <div class="form-group">
            @Html.LabelFor(m => m.Password)
            @Html.PasswordFor(m => m.Password, new { @class = "form-control" })
        </div>
        <button type="submit" class="btn btn-primary btn-block">Login</button>
    }
    <p class="text-danger">@ViewBag.Message</p>
</div>
Views/Login/Dashboard.cshtml
@{
    ViewBag.Title = "Dashboard";
}
<div class="container mt-5">
    <h2>Welcome, @Session["User"]!</h2>
    <p>Your role: <strong>@ViewBag.Role</strong></p>

    @if (ViewBag.Role == "Admin")
    {
        <p>You have access to admin features.</p>
    }
    else if (ViewBag.Role == "Customer")
    {
        <p>You have access to customer features.</p>
    }

    <a href="@Url.Action("Logout", "Login")" class="btn btn-danger">Logout</a>
</div>
In App_Start/RouteConfig.cs:
routes.MapRoute(
    name: "Default",
    url: "{controller}/{action}/{id}",
    defaults: new { controller = "Login", action = "Index", id = UrlParameter.Optional }
);
Models/User.cs
public class User
{
    public string Username { get; set; }
    public string Password { get; set; }
    public string Role { get; set; }
}