app_context_00.md

Questions

Question 1: Bad designed API

It seems that the API of getting switches in AppContext class is of a bad design. Could you please provide a good one?

Ironically, the design of TryGetSwitch illustrates how not to write APIs. The out parameter is unnecessary, and the method should instead return a nullable bool whose value is true, false, or null for undefined. This would then enable the following use:

bool switchValue = AppContext.GetSwitch ("...") ?? false;

Question 2: Feature toggle

What is a good feature toggling solution.

• Feature toggle at API level (just like what we have done in our test).
• Feature toggle inside the member implementation.