[Solved] ReturnUrl always return null in ASP.Net MVC

Hello All,

I am trying to redirect to the requested page after authentication. But after clicking login, the returnUrl is empty even though there is URL specified.

Below is my code

@using (Html.BeginForm("SignIn", "Login", new { ReturnUrl = Request.QueryString["ReturnUrl"]}, FormMethod.Post, new { @class = "login-form form-horizontal flex-column flex-center"})) {
<div class="flex-column flex-center flex-grow">
    <img src="~/images/test.png" />
    <!---->
    @if (TempData["Msg"] != null) {
    <div class="text-danger">
        @TempData["Msg"].ToString()
    </div>
    }
    <div class="margin-md">
        <div class="ember-view input-group">
            <span class="input-group-addon login-form-addon"><i class="fa fa-user"></i></span>
            <input id="ember2302" class="ember-view ember-text-field form-control" autofocus=""
                placeholder="Email address" name="UserEmail" type="text">
        </div>
    </div>
    <div class="margin-md">
        <div class="ember-view input-group">
            <span class="input-group-addon login-form-addon"><i class="fa fa-lock"></i></span>
            <input class="ember-view ember-text-field form-control" placeholder="Password" name="UserPassword"
                type="password">
        </div>
    </div>
    <a class="ember-view btn btn-link" href="ForgotPassword">Forgot your password?</a>
    <div class="login-form__state-message login-form__state-message--success">
        &nbsp;</div>
</div>
<div class="flex flex-split flex-align-stretch pad-lg background-grey">
    <div>
    </div>
    <button class="btn btn-primary" type="submit" formaction="Login">
        Sign In</button>
</div>
}

Controller

[HttpPost]
public ActionResult Login(tbl_UsersMaster UserInfo, string ReturnUrl)
{
    ModelState.Remove("ConfirmPassword");
    if (ModelState.IsValid)
    {
        try
        {
            if (Membership.ValidateUser(UserInfo.UserEmail, UserInfo.UserPassword))
            {
                Session["UserId"] = db.tbl_UsersMaster.Where(x => x.UserEmail == UserInfo.UserEmail && x.UserPassword == UserInfo.UserPassword).Select(x => x.UserId).SingleOrDefault();
                //Session["UserId"] = objdb.GetAll().Where(x=>x.UserEmail==UserInfo.UserEmail && x.UserPassword==UserInfo.UserPassword);
                FormsAuthentication.SetAuthCookie(UserInfo.UserEmail, false);
                //FormsAuthentication.SetAuthCookie(UserInfo.UserId, false);
                int UserRole = int.Parse(db.tbl_UsersMaster.Where(x => x.UserEmail == UserInfo.UserEmail && x.UserPassword == UserInfo.UserPassword).Select(x => x.UserRole).SingleOrDefault().ToString());
                if (ReturnUrl != null)
                {
                    return RedirectToAction(ReturnUrl);
                }
                if (UserRole == 2 || UserRole == 3)
                {
                    return RedirectToAction("History", "Design", new { area = "Designers" });
                }
                else
                {
                    return RedirectToAction("Index", "Actions", new { area = "Managers" });
                }
            }
            else
            {
                TempData["Msg"] = "Login Failed. Incorrect Email or Password";
                return RedirectToAction("Login");
            }
        }
        catch (Exception ex)
        {
            TempData["Msg"] = "Login Failed." + ex.Message;
            return RedirectToAction("Login");
        }
    }
    else
    {
        TempData["Msg"] = "Please enter UserName & Password";
        return RedirectToAction("Login");
    }
}