Untitled

@using System.Security.Claims;
@{

    Microsoft.Owin.IOwinContext ctx = Request.GetOwinContext();
    var usr = Request["text1"];
    if (IsPost && usr == "valid@user.com")
    {
        ctx.Authentication.SignOut(Microsoft.AspNet.Identity.DefaultAuthenticationTypes.ApplicationCookie);

        var claims = new List<Claim>();
        claims.Add(new Claim(ClaimTypes.Email, usr));
        claims.Add(new Claim(ClaimTypes.Name, var));
        var id = new ClaimsIdentity(claims, Microsoft.AspNet.Identity.DefaultAuthenticationTypes.ApplicationCookie);
        ctx.Authentication.SignIn(id);
        //FormsAuthentication.SetAuthCookie("valid@user.com", false); // Also fails
    }
    var IP = HttpContext.Current.User.Identity.IsAuthenticated.ToString();
    var text = "valid@user.com";

}
<!DOCTYPE html>
<html lang="en">
    <head><title></title></head>
    <body>
        <p>Are we Logged in? <strong>@IP</strong>.</p>
        <form action="" method="post">
            <p>
                <label for="text1">First Number:</label>
                <input type="text" name="text1" value="@text" />
            <p><input type="submit" value="Add" /></p>
        </form>
    </body>
</html>

using Microsoft.AspNet.Identity;
using Microsoft.Owin;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.Cookies;
using Owin;

[assembly: OwinStartup(typeof(TypeScriptHTMLApp1.Startup1))]

namespace TypeScriptHTMLApp1
{
    public class Startup1
    {
        public void Configuration(IAppBuilder app)
        {
            // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=316888
            app.UseCookieAuthentication(new CookieAuthenticationOptions
            {
                AuthenticationType =DefaultAuthenticationTypes.ApplicationCookie,
                AuthenticationMode = AuthenticationMode.Passive,
            });
        }
    }
}