How to solve "String was not recognized as a valid DateTime." when parse a date?

By ParseExact
var date = System.DateTime.ParseExact(StartDate, "MM/dd/yyyy",null);

How to check if user is logged in ASP.NET MVC

            if (!Request.IsAuthenticated)
            {
                return RedirectToAction("LogOn","Account");
            }

Free online events registration system with QR code support

Free Online event registration system with QR code support
http://myevents.apphb.com

SignalR – Push Data To Clients Using IHubContext

http://blog.mirajavora.com/signalr-push-data-to-clients-using-ihubcontext