Microsoft Visual Studio 2015 [best] -
Visual Studio 2015 introduced several modernizing features designed to streamline the developer experience:
While previous versions had Edit and Continue, VS2015 made it work for 64-bit applications and improved it for async/await patterns. You could modify code in break mode and see the changes instantly—a massive productivity boost. microsoft visual studio 2015
Today, most developers have moved on. But Visual Studio 2015 continues to live in specific niches: microsoft visual studio 2015
For enterprises stuck on legacy systems, VS 2015 is notable for being the last version of Visual Studio that can generate code targeting Windows XP (via the v140_xp platform toolset). VS 2017 and later dropped this ability, meaning many industrial and government projects remain on VS 2015 even today. microsoft visual studio 2015