dotnet core middleware

1. https://blog.johnwu.cc/article/ironman-day03-asp-net-core-middleware.html

2.  doente core parameter

3. middleware good flow

4. middleware logger exmpale

5. middleware china

6. middleware flow good2

7. middeware flow en

8. write view but diff

9. write view 2

10. stack over

11. middleware parameter