How to fix problem: To call this method, the "Membership.Provider" property must be an instance of "ExtendedMembershipProvider"?

Because you are using SimpleMembership provider.
Either remove any other membership provider setting in web.config
Or
you add following setting in web.config file

Reference:
http://weblogs.asp.net/jgalloway/archive/2012/08/29/simplemembership-membership-providers-universal-providers-and-the-new-asp-net-4-5-web-forms-and-asp-net-mvc-4-templates.aspx

How to change password format in SimpleMembership?

No. Can't change password format like: SqlMembershipProvider.PasswordFormat

How to use bundle for Javascript and css in ASP.NET MVC?

1. Define bundle:
    public class BundleConfig
    {
        // For more information on Bundling, visit http://go.microsoft.com/fwlink/?LinkId=254725
        public static void RegisterBundles(BundleCollection bundles)
        {
            bundles.Add(new ScriptBundle("~/bundles/jquery").Include(
                        "~/Scripts/jquery-{version}.js"));
            bundles.Add(new ScriptBundle("~/bundles/jqueryui").Include(
                        "~/Scripts/jquery-ui-{version}.js"));
 }
     }
2. Register Bundle:
In Global.asax
        protected void Application_Start()
        {
            BundleConfig.RegisterBundles(BundleTable.Bundles);
 }
3. Refer bundle
In Razor view
    @Scripts.Render("~/bundles/jquery")

"display: inline-block" (Items does not display horizontally) not working in IE

Change to:
display: inline;
Reference:
http://stackoverflow.com/questions/5838454/inline-block-doesnt-work-in-internet-explorer-7-6

How to implement multiple [Order by] in LINQ?

Var list = _db.Lists.Orderby(c => c.filed1).ThenBy(n => n.field2)