public void CreateCookie(string user, string password, bool isAuth = false)
{
   const string cookiesName = "AUTH_COOKIES";

   FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1, user, DateTime.Now, DateTime.Now.Add(FormsAuthentication.Timeout), isAuth, password, FormsAuthentication.FormsCookiePath);

   HttpCookie cookies = new HttpCookie(cookiesName)
   {
      Value = FormsAuthentication.Encrypt(ticket),
      Expires = DateTime.Now.Add(FormsAuthentication.Timeout)
   };

   Response.Cookies.Add(cookies);
}

public UserInfo GetCookies(string encryptCookie)
{
    var decryptCookies = FormsAuthentication.Decrypt(encryptCookie);

    return new UserInfo() { Username = decryptCookies.Name, Password = decryptCookies.UserData };
}