Two top Microsoft Developer Division Executives: Scott Guthrie and “Soma” Somasegar - announced today (December 12) that official launch of Microsoft flagship development tool Microsoft Visual Studio 2010 and .NET Framework 4 platform will be moved from March 22 further and that Microsoft is planing to extend the beta period by adding another interim checkpoint release, a Release Candidate with a broad “go live” license, which will be publicly available in the February 2010 timeframe.