ASP.NET is a web application framework developed by Microsoft. It is used to build dynamic web sites, web applications and web services. ASP.NET is built on top of the .NET Framework, which is a software platform that provides a set of libraries and services for building applications. The .NET Framework 4.5 is a major release of the .NET Framework that was released in 2012. It includes a number of new features and improvements, such as support for Windows 8, improved performance, and new securit