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POCA1819: Properties shouldn't return arrays - What is the right alternative?
 

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    <p>I encountered this FxCop rule before and wasn't really content with how to solve violations (<a href="https://stackoverflow.com/questions/3324053/why-properties-that-return-arrays-are-prone-to-code-inefficiencies">thread1</a>, <a href="https://stackoverflow.com/questions/6596166/fxcop-returning-matrix-as-property-c">thread2</a>). I now have another case where I need to correct violations of the <a href="http://msdn.microsoft.com/query/dev10.query?appId=Dev10IDEF1&amp;l=EN-US&amp;k=k%28PROPERTIESSHOULDNOTRETURNARRAYS%29;k%28TargetFrameworkMoniker-%22.NETFRAMEWORK,VERSION=V4.0%22%29&amp;rd=true" rel="nofollow noreferrer">CA1819</a> kind.</p> <p>Specifically, I have an algorithm-library that performs some analytic calculations on a curve (x,y), with a public "input object" like this:</p> <pre><code>public class InputObject { public double[] X { get; set; } public double[] Y { get; set; } // + lots of other things well } </code></pre> <p>This object's X and Y properties are used in hundreds of locations within library, typically using indexes. The input object is never altered by the algorithms, but actually it shouldn't matter if so. Also, <code>.Length</code> is called pretty frequently. It's a mathematical library, and <code>double[]</code> is kind of the standard data type in there. In any case, fixing CA1819 will require quite some work.</p> <p>I thought about using <code>List&lt;double&gt;</code>, since Lists support indexing and are quite similar to arrays but I'm not sure whether this may slow down the algorithms or whether FxCop will be happy with those Lists. </p> <p>What is the best option to replace these <code>double[]</code> properties?</p>
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    1. CO@skk that's the 'thread1' the question links to...
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