Is the body expression more efficient than the simple return of a member variable?

Question

Having the class with the variable and the method like this:

class TheClass
{
    protected string tag_;
    ...
    public string Tag()
    {
        return tag_;
    }
}

the IDE suggests to replace the Tag() method definition like this:

class TheClass
{
    protected string tag_;
    ...
    public string Tag() => tag_;
}

What are the pros and cons? Is the result of compilation and/or optimization of both versions the same?

You do understand when the IDE suggest something, is just a syntactic sugar. — Rainbow, May 11 '18 at 18:57
@ZohirSalakCeNa Not all IDE suggestions are syntactic sugar, although many of them are. — Racil Hilan, May 11 '18 at 18:58
@ZohirSalakCeNa - not all the time and also depending on the IDE — Igor, May 11 '18 at 18:58
@ZohirSalakCeNa I am not sure. I can imagine that some suggestions may actually be more efficient. — pepr, May 11 '18 at 18:59
I am not the IDE but I suggest you don't put underscore at the end of field name, it looks horrible. — Selman Genç, May 11 '18 at 19:07
@SelmanGenç: C++ habit (where it makes sense). On the other hand, the look is not as important as the purpose. — pepr, May 11 '18 at 20:40

score 1 · Accepted Answer · answered May 11 '18 at 19:03

1

The second code snippet is a pure syntactic sugar added in C# 6.0. That means it compiles to the exact same IL code as the first snippet and there is absolutely no difference in performance (or otherwise) at runtime. Use whatever style you like.

answered May 11 '18 at 19:03

Racil Hilan

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Is the body expression more efficient than the simple return of a member variable?

1 Answers1