A lot of people don’t seem to realize that setting readonly variables is indeed possible, it can only be done from inside the constructor:
public class SomeClass
{
private readonly ISomeService _someService;
private readonly ISomeOtherService _someOtherService;
public SomeClass(ISomeService someService, ISomeOtherService someOtherService)
{
_someService = someService;
_someOtherService = someOtherService;
}
}
This is perfectly fine working code and I strongly recommend it. I use this a lot with dependency injection (DI). This makes sure that the injected instances cannot be overridden, because they can only be set in the constructor.
That’s why I really don’t like the requirement of a parameterless constructor in UserControls in WebForms. There is no possibility for injection, only resolving is possible.
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I'm a software developer from Utrecht. Interested in DDD, continuous delivery, new technologies & frameworks.
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