Microsoft warned developers that a new version of visual studio was coming out in 2013, but that asp.net was getting a big update off-cycle, it was news to everyone. and it was very good news -- when asp.net 4.5.1 was announced during the keynote at microsofts build developer conference (10,000+ attendees) in june 2013, developers cheered.? asp.net 4.5.1 fixes issues that kept many developers from updating to 4.5, and which also hurt book sales for vs 2012 and asp.net titles. the three main complaints with visual studio 2012 and asp.net 4.5 centered around productivity, application performance, and the ability to modernize more quickly.?long-time wrox favorite imar spaanjaars tackles these updates in his best-selling beginning asp.net, including:? developer productivity improvements: x64 edit and continue, async-aware debugging, managed return value inspection, ado.