On 15th Aug, 2012, ASP.NET Development Framework 4.5 was released. Being an upgraded version of ASP.NET, it was bound to have elevated features in its framework. Only Windows Vista or later supports ASP.NET 4.5. This framework makes use of Common Language Runtime 4.0 along with additional features of runtime. The latest version of ASP.NET is ASP.NET 4.5.2 that was released on 5 May 2014. It is an upgrade of Microsoft .NET Framework 4, Microsoft .NET Framework 4.5 and Microsoft .NET Framework 4.5.1.