V6.15

[liuyl1992]

生产可用版本，支持3.1、6.0，已将所有依赖以nuget包的方式提供，按需安装，只需引用核心包NetPro.Startup 即可开发按需引用的自定义中间件

Production available version, support 3.1, 6.0, all dependencies have been provided in the way of Nuget package, on demand installation, only need to reference the core package 'NetPro.Startup' can be developed on demand reference custom middleware

---

This discussion was created from the release V6.15.