The .NET Framework is a software framework developed by Microsoft that was originally proprietary code, which they later opened up to the development community. It runs primarily on Microsoft Windows and includes a large class library known as the Framework Class Library (FCL) providing interoperability by allowing each language to use code written in other languages or across several programming languages. Programs written for .NET Framework execute in a software environment appropriately called the Common Language Runtime (CLR), a virtual machine that provides: security, memory management, and exception handling.
The FCL offers programmers: user interface, data access, database connectivity, cryptography, web application development, and network communications components. Overall this is one of the easiest and best solutions for projects intended to operate specifically on a Windows platform, however it lacks the ability to be platform agnostic and leaves you project “locked in” to the Windows ecosystem, requiring a completely new build if you later want to make use of Linux or any other platform choice.