<authorization>
     <deny users="?" />
</authorization>

<location path="elmah.axd">
    <system.web>
        <authorization>
            <allow roles="Admin" />
            <deny users="*" />
        </authorization>
    </system.web>
</location>

   using SQLDMO;
   using System.Collections.Generic;

   public static List<string> GetSQLServersList2()
   {
       List<string> result = new List<string>();
       ApplicationClass sqlApp = new ApplicationClass();
       NameList lst = sqlApp.ListAvailableSQLServers();
       for (int i = 1; i <= lst.Count; i++)
           result.Add(lst.Item(i));
       lst = null;
       sqlApp = null;

       return result;

   }

using System.Collections.Generic;
using System.Data;
using System.Data.Sql;

public class CListServers
{
   public static List<string> GetSQLServersList()
   {
       List<string> result = new List<string>();

       // Retrieve the enumerator instance and then the data.
       var instance = SqlDataSourceEnumerator.Instance;
       var table = instance.GetDataSources();

       // Display the contents of the table.
       foreach (DataRow row in table.Rows)
       {
           result.Add(string.Format("{0}\\{1}", row[0], row[1]));
       }

       return result;
   }
}

using System.Collections.Generic;
using System.Data;
using Microsoft.SqlServer.Management.Smo;

public class CListServers
{
   public static List<string> GetSQLServersListSMO()
   {
       List<string> result = new List<string>();
       DataTable dt = SmoApplication.EnumAvailableSqlServers(false);
       if (dt.Rows.Count > 0)
       {
           foreach (DataRow dr in dt.Rows)
           {
               result.Add(dr["Name"].ToString());
           }
       }
       return result;
   }
}

  public class IdentityUser : IUser
    {
        public IdentityUser();
        public IdentityUser(string userName);
 
        public virtual ICollection<identityuserclaim> Claims { get; }
        public virtual string Id { get; set; }
        public virtual ICollection<identityuserlogin> Logins { get; }
        public virtual string PasswordHash { get; set; }
        public virtual ICollection<identityuserrole> Roles { get; }
        public virtual string SecurityStamp { get; set; }
        public virtual string UserName { get; set; }
    }

public class ApplicationUser : IdentityUser
{
    public string Email { get; set; }
}

public class RegisterViewModel
{
    [Required]
    [Display(Name = "User name")]
    public string UserName { get; set; }
 
    [Required]
    [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
    [DataType(DataType.Password)]
    [Display(Name = "Password")]
    public string Password { get; set; }
 
    [DataType(DataType.Password)]
    [Display(Name = "Confirm password")]
    [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
    public string ConfirmPassword { get; set; }
 
    [Required]
    [Display(Name = "Email address")]
    public string Email { get; set; }
 
}

<div class="form-group">
     @Html.LabelFor(m => m.Email, new { @class = "col-md-2 control-label" })
     <div class="col-md-10">
         @Html.TextBoxFor(m => m.Email, new { @class = "form-control" })
     </div>
 </div>

public ActionResult About()
{
    ViewBag.Message = "Your application description page.";
    UserManager<ApplicationUser> UserManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(new ApplicationDbContext()));         
    var user = UserManager.FindById(User.Identity.GetUserId());
    if (user != null)
        ViewBag.Email = user.Email;
    else
        ViewBag.Email = "User not found.";
 
    return View();
}