Versions of .NET

Release 4.5.1

  • Released on 2014-01-15
  • CLR Version 4
  • Included in Windows 8.1
  • Installable on Windows 8, 7, Vista
  • Included in Windows Server 2012 R2
  • Installable on Windows Server 2012, 2008 R2 SP1, 2008 SP2
  • New features

Release notes

(Source)