How to add a field to save current time in SQL Server?

In property window for that culumn:
set the "Default value or binding" getdate()

How to add System.Web.Extensions reference in Console project?

In Visual Studio, project property page
Change Target Framework from Client profile to the full framework

How to make ASP.NET MVC action no caching?

        [OutputCache(Duration = 0, VaryByParam = "None")]
        public ActionResult ActionName()
        {
        }

15 jQuery Code Snippets for Developers

http://codegeekz.com/15-jquery-code-snippets-for-developers/

What is the event called for closing window in Javascript?

Onbeforeunload
Reference: https://developer.mozilla.org/en-US/docs/Web/API/window.onbeforeunload

window.onbeforeunload = function(e) {
  return 'Dialog text here.';
};