Ability to Build Metro-style Applications
The UI is probably the first thing youâ€™ll notice about VS 2012 RC. The monochrome scheme in earlier versions of VS 2012 was met with a bitter backlash as developers took an instant dislike to it. In fairness, the idea was to deemphasize the UI and make the code stand out more. However, that was a bad idea. VS 2012 RC reintroduces color, and once again you can tell the difference between the icons on the toolbars. That said, personally, I prefer the VS 2010 UI and colors (except for the cool game-like installer in VS 2012 RC).
Microsoft.NET Framework 4.5
While itâ€™s not technically a part of VS 2012, every new release of Visual Studio is accompanied by a new release of the .NET Framework. In this case, it's the new .NET Framework 4.5. Its big changes include improved support for parallelism and IPv6, support for zip compression, HTML 5, WebSockets, and WPF Ribbon bar support. ASP.NET Web Forms has been updated to support the asynchronous modules and handles, lots more.
In earlier releases of Visual Studio, LightSwitch was a separately purchased product. The VS 2012 release includes LightSwitch in the VS 2012 Professional editions and above. I always said LightSwitch was a developer tool and not a user tool, and it seems that Microsoft now agrees. The VS 2012 LightSwitch has a new theme, support for branding, and improved performance.
Visual Studio used to use its own ASP.NET Development Server as the default web server for locally running and testing web applications. However, that meant you often ran into a variety of differences and incompatibilities when you went to deploy your applications on IIS. VS 2012 solves this problem by using IIS Express as the default local web server. IIS Express is a lightweight, self-contained version of IIS. It has all of the core capabilities of the full-fledged IIS, but it doesn't run as a service.
Support for WinRT
New Solution Explorer
As you begin to use VS 2012, youâ€™ll definitely notice the new Solution Explorer. It's like a cross between the old Object Browser and Class View. You can navigate your projectâ€™s objects and drill down into methods and properties. It also enables you to search and preview file, objects and external items.
New SQL Server Object Explorer
Visual Studio has always been weak in the area of SQL Server navigation. VS 2012 improves its SQL Server integration with the new SQL Server Object Explorer, which is more like SQL Server Management Studio than the old Server Explorer. The new SQL Server Object Explorer shows column data types as well as primary and foreign keys.