How to Correctly Detect Credit Card Type

http://creditcardjs.com/credit-card-type-detection Card Type	Card Number Prefix
American Express	34, 37
China UnionPay	62, 88
Diners ClubCarte Blanche	300-305
Diners Club International	300-305, 309, 36, 38-39
Diners Club US & Canada	54, 55
Discover Card	6011, 622126-622925, 644-649, 65
JCB	3528-3589
Laser	6304, 6706, 6771, 6709
Maestro	5018, 5020, 5038, 5612, 5893, 6304, 6759, 6761, 6762, 6763, 0604, 6390
Dankort	5019
MasterCard	50-55
Visa	4
Visa Electron	4026, 417500, 4405, 4508, 4844, 4913, 4917

The simple way to add Google login (OpenID) into ASP.NET MVC project

Step 1: Add DotnetOpenAuth lib from http://www.dotnetopenauth.net/ into ASP.NET MVC project reference
Step 2: Add following section into web.config file:

Step 3: Add an action for Authentication

protected static OpenIdRelyingParty openid = new OpenIdRelyingParty();
        [ValidateInput(false)]
        public ActionResult LoginByGoogle(string returnUrl)
        {
            var response = openid.GetResponse();
            if (response == null)
            {
                string openidUrl = "https://www.google.com/accounts/o8/id";
                Identifier id;
                if (Identifier.TryParse(openidUrl, out id))
                {
                    try
                    {
                        var req = openid.CreateRequest(openidUrl);
                        var fetch = new FetchRequest();
                        fetch.Attributes.Add(new AttributeRequest(WellKnownAttributes.Contact.Email, true));
                        req.AddExtension(fetch);
                        return req.RedirectingResponse.AsActionResult();
                    }
                    catch (ProtocolException ex)
                    {
                        ViewData["Message"] = ex.Message;
                        return View("LogOn");
                    }
                }

                ViewData["Message"] = "Invalid identifier";
                return View("LogOn");
            }
            switch (response.Status)
            {
                case AuthenticationStatus.Authenticated:
                    Session["FriendlyIdentifier"] = response.ClaimedIdentifier;
                    var sreg = response.GetExtension();
                    if (sreg != null)
                    {
                        var model = new RegisterModel()
                        {
                            Email = sreg.Email,
                        };
                        FormsAuthentication.SetAuthCookie(model.Email, true /* createPersistentCookie */);
                        return RedirectToAction("Home", "Index");
                    }
                    return View("LogOn");
                case AuthenticationStatus.Canceled:
                    ViewData["Message"] = "Canceled at provider";
                    return View("LogOn");
                case AuthenticationStatus.Failed:
                    ViewData["Message"] = response.Exception.Message;
                    return View("LogOn");
            }

            return new EmptyResult();
        }

Step 4: Add a link to point to this Action
@Html.ActionLink("Log in using Google", "LoginByGoogle")

PHP or ASP.NET: Did I Do The Right Thing?

http://www.wekeroad.com/2014/02/18/i-had-a-choice-php-or-net/

How to add log4net into ASP.NET project?

1. Download dll file from
http://logging.apache.org/log4net/download_log4net.cgi
2.Add following log4net.config file into project

3. In Global.asax

protected void Application_Start()
        {
            string l4net = Server.MapPath("~/log4net.config");
            log4net.Config.XmlConfigurator.ConfigureAndWatch(new System.IO.FileInfo(l4net));
        }

4. Add write permission setting for log file folder
IIS manager -> Application pool -> Get name of application pool
File explorer -> folder property -> Security -> Add IIS AppPool\\app pool name into log file folder write/read permission.

http://blogs.iis.net/webdevelopertips/archive/2009/10/02/tip-98-did-you-know-the-default-application-pool-identity-in-iis-7
-5-windows-7-changed-from-networkservice-to-apppoolidentity.aspx

5. Usage:

ILog log = LogManager.GetLogger(typeof(this));
log.Info("message");

References:
Apache log4net™ Manual - Configuration
http://logging.apache.org/log4net/release/manual/configuration.html
http://ruchirac.blogspot.ca/2012/10/configure-log4net-with-aspnet-logging.html

How to get application root path in ASP.MVC 3 and 3+

string rootpath = HttpContext.Current.Request.ApplicationPath;
Or
string rootpath = Url.Content("~"),