Versions of .NET

Release 4.5

  • Released on 2012-08-15
  • CLR Version 4
  • Included in Windows 8
  • Installable on Windows Vista SP2, 7 SP1
  • Included in Windows Server 2012
  • Installable on Windows Server 2008 SP2, 2008 R2 SP1
  • New features

Release notes

(Source)