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POHow would you name these related Property, Class, Parameter and Field in .NET?
 

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  1. POHow would you name these related Property, Class, Parameter and Field in .NET?
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    <p>I often find I want to write code something like this in C#, but I am uncomfortable with the identifier names:</p> <pre><code>public class Car { private Engine engine; public Engine Engine { get { return engine; } set { engine = value; } } public Car(Engine engine) { this.engine = engine; } } </code></pre> <p>Here we have four different things called "engine":</p> <ul> <li><code>Engine</code> the class. Engine seems like a good, natural name.</li> <li><code>Engine</code> the public property. Seems silly to call it MyEngine or TheCarsEngine.</li> <li><code>engine</code> the private field backing the property. Some naming schemes will recommend <code>m_engine</code> or <code>_engine</code>, but others say that all prefixes should be avoided.</li> <li><code>engine</code> the parameter name on the constructor. I've seen naming schemes that recommend prefixing an underscore on all parameters, e.g., <code>_engine</code>. I really dislike this, since the parameter is visible to callers via Intellisense.</li> </ul> <p>The particular things I don't like about the code as written are that:</p> <ul> <li>If you change the parameter name in the constructor but miss a use of it in the constructor body, you get a subtle bug that the compiler probably won't be able to spot.</li> <li>Intellisense has a bad habit of autocompleting the wrong thing for you, and sometimes you won't notice it's changed the case. You will again get a subtle bug if the constructor body accidentally ends up <code>this.engine = Engine;</code></li> </ul> <p>It seems that each name is appropriate in isolation, but together they are bad. Something has to yield, but what? I prefer to change the private field, since it's not visible to users, so I'll usually end up with <code>m_engine</code>, which solves some problems, but introduces a prefix and doesn't stop Intellisense from changing <code>engine</code> to <code>Engine</code>.</p> <p>How would you rename these four items? Why?</p> <p>(Note: I realise the property in this example could be an automatic property. I just didn't want to make the example overcomplicated.)</p> <p>See also: <a href="https://stackoverflow.com/questions/461231/am-i-immoral-for-using-a-variable-name-that-differs-from-its-type-only-by-case">Am I immoral for using a variable name that differs from its type only by case?</a></p>
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    1. COYou must also add "local variable" to the list.
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    2. COThis needs the "Subjective" tag too, I think.
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    3. COGood idea, lotsoffreetime, I didn't even know there was one. Done.
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