Here is short list of stuff that has been introduced in MS Visual Studio 2012 for SharePoint development. The over all color theme of MS Visual Studio 2012 is quite different than as it was in MS Visual Studio 2010.
Here is the description of some new features introduced in Visual Studio 2012 for SharePoint development.
- Streamlined SharePoint Project Templates
- Create Site Columns, Lists and Content Types by Using New Designers
- Create Silverlight Web Parts
- Publish SharePoint Solutions to Remote SharePoint Servers
- Test SharePoint Performance by Using Profiling Tools
- Create Sandboxed Visual Web Parts
- Improved Support for Sandboxed Solutions.
- Support for JavaScript Debugging and IntelliSense for JavaScript
More details are available here: What’s New for SharePoint Development in Visual Studio 2012
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