Optional output parameter in c#

c# - C# optional out/ref arguments - Stack Overflow

I have a method that has several overrides. In one of the more expanded overrides, I want to return an OUT parameter but not in my simpler overrides.

null - C# Optional Out Parameter - Stack Overflow

That looks fine to me. A out cannot be optional for technical reasons it needs to point to a valid instance.

Personally I think it is fine "as is". Another approach, though, is to return a composite return value perhaps an immutable struct with 2 properties ; that avoids the fact that some people avoid out. I am not one of those people: If you wanted to get unnecessarily fancy you could give the conposite return-type a conversion to bool to allow implicit if tests.

It changes the semantics of what param3 is. The caller still must supply all three arguments. Overloading IsPossible by providing an overload -- the "don't care" scenario -- that discards the reference parameter is the proper solution.

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Join them; it only takes a minute: Can I or should I use a null-able out parameter? Derek Hunziker 9, 3 41 Having a sarnoff options trader time believing the reason for not supporting this is technical more than marketing priorities.

Seems the compiler could just create a temp location just as your example--and also for Refs by init'ing with Default T. A 'ref' or 'out' parameter cannot have a default value.

Passing optional parameter by reference in c++ - Stack Overflow

The way you've done it is just fine. Sorry, no silver bullet. A nullable out parameter won't do you much good.

Yes, Nullable variables are great. You would then do something like this. Jethro 5, 1 14 I don't find this API style hugely obvious to the caller, personally. What do you mean obvoius to the caller?

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c# - Optional Output Parameters - Stack Overflow

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