NET Framework 4.5 includes significant language and framework enhancements for C#, Visual Basic, and F# (so that you can more easily write asynchronous code), the blending of control flow in synchronous code, a responsive UI, and web app scalability. NET Framework 4.5 together with the C#, Visual Basic, or F# programming language, you can write Windows apps.
NET Framework 4.5 is a highly compatible, in-place update to the.