NetCore Articles
http://www.dotnetcurry.com/dotnet/1360/concurrent-programming-dotnet-core
Concurrency
https://docs.microsoft.com/en-us/aspnet/core/data/ef-mvc/concurrency
Config Concurrency in Net Core Web API
https://stackoverflow.com/questions/44391268/how-to-configure-concurrency-in-net-core-web-api
Unit Test
https://docs.microsoft.com/en-us/dotnet/core/testing/unit-testing-with-dotnet-test
http://codingsight.com/preparing-for-exam-70-483-programming-in-c/