Visual Studio 2015 Community was a landmark release from Microsoft. It was the first time a fully-featured, free, and extensible IDE (Integrated Development Environment) was made available to individual developers, open-source contributors, and small teams. While Microsoft has since moved on to Visual Studio 2017, 2019, and 2022, many legacy projects—especially those targeting Windows XP , .NET Framework 4.5/4.6 , or specific older SDKs—still require this exact version.