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server-side, client-side, code snippets, scripts, automation, best practices, proven approaches, tips & tricks... the best option to use for a return type in asp.net core webapi controller. choosing the proper return type for webapi controller actions starting from .net core version 2.1, there are so far three types of webapi responses that controller actions can return. all three types had it's own pros and cons but all are lacking in options to satisfy both rest and the high level of testability. the available response types in asp.net core including recently released 2.2 version are...read more. registering multiple implementations of the same interface in asp.net core. multiple implementations of an interface in .net core dependency injection starting from it's initial release asp .net core comes with built in dependency injection (di) to help implement inversion of control design pattern. this is not something new in .net and apart from built-in di in .net core, there are other libraries which provide same and in some cases even more advanced dependency injection implementation...read more reading port from configuration file in program clas* main method when running asp.net core application as self-hosted using kestrel, it will by default use port 5000 for listening for requests. this should not be a big issue since you can always proxy requests to port 5000.problem occurs when you might want to have multiple applications on one host, or you simply cannot use port 5000 for security or any other reasons.luckily, default port for asp.net core application running on kestrel can be easily changed, but in order to make it easily configurable there are few changes you need to make in your code in order to access ihostingenvironment and iconfiguration implementation instances combined....read more. using displayname attribute for model validation output in asp.net mvc core. returning displayname attribute value in model validation response in mvc core