The Microsoft.NET Framework version 4.5.1 manages services that are part of the Microsoft operating system such as memory management, security and stability, as of 2015. Version 4.5.1 of the Microsoft.NET Framework also allows for software development of applications.
Version 4.5.1 of the Microsoft.NET Framework has a library of tools that software developers use to create applications that can run as part of the Microsoft operating system or as part of Internet services such as Web forms. In addition, the Microsoft .NET framework also supports open-source coding for developers of Android and iPhone apps.
The .NET framework has been available since 2003, as noted on the Microsoft Developer Network