Hi Dmitrij :-)

If you a looking for basic member login form for Umbraco in Razor, then there are one pre-code snippet in Umbraco.

It´s contains this code:

@using System.Web.Mvc.Html
@using ClientDependency.Core.Mvc
@using Umbraco.Web
@using Umbraco.Web.Models
@using Umbraco.Web.Controllers

@{
    var loginModel = new LoginModel();

    Html.EnableClientValidation();
    Html.EnableUnobtrusiveJavaScript();
    Html.RequiresJs("/umbraco_client/ui/jquery.js");
    Html.RequiresJs("/umbraco_client/Application/JQuery/jquery.validate.min.js");
    Html.RequiresJs("/umbraco_client/Application/JQuery/jquery.validate.unobtrusive.min.js");
}

@* NOTE: This RenderJsHere code should be put on your main template page where the rest of your script tags are placed *@
@Html.RenderJsHere()

@using (Html.BeginUmbracoForm<UmbLoginController>("HandleLogin"))
{
    <fieldset>
        <legend>Login</legend>

        @Html.ValidationSummary("loginModel", true)

        @Html.LabelFor(m => loginModel.Username)
        @Html.TextBoxFor(m => loginModel.Username)
        @Html.ValidationMessageFor(m => loginModel.Username)
        <br />

        @Html.LabelFor(m => loginModel.Password)
        @Html.PasswordFor(m => loginModel.Password)
        @Html.ValidationMessageFor(m => loginModel.Password)
        <br />

        <button>Login</button>
    </fieldset>  
}

There are also other pre-code snippet regarding to login functionality like login status. You can find it, when you create a new partial view or partial view macro file.

I have added a screenshot so you can see where to find it.

Hope this helps,

/Dennis