1.Visual Studio 2015:https://docs.microsoft.com/en-us/visualstudio/releasenotes/vs2015-version-history
2.Visual Studio 2017:https://docs.microsoft.com/en-us/visualstudio/releasenotes/vs2017-relnotes
3.Visual Studio 2019:https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes